Open Source Security
Open Source Security is a media project that aims to showcase and educate on open source security. The podcast gives the community a platform to educate both developers and users on how open source security works. It focuses on the people and teams doing the work, highlighting their contributions and teaching listeners about their methods.
Episodes
Dependency attacks in 2026 with James Matchett
Josh chats with James Matchett from Cloudsmith about a new report they put out. It has some scary looking statistics in it about how organizations are using dependencies. There are some surprising numbers in there, but the story is really one of defense in depth. There's no single thing we can do here, it's all about knowing what you have every step of the way. It's easy to say, but certainly a ch
Sovereignty, policy, and OpenUK with Amanda Brock
Josh welcomes Amanda Brock from OpenUK to chat about sovereignty, policy, open source, and a whole host of other topics. Amanda has front row seat into how sovereignty decisions can affect a county and its open source. It seems sometimes like open source is a global phenomenon, but there are always country wide considerations. This is what the OpenUK is doing in the UK. The discussion is great and
The curl summer of Bliss with Daniel and Stefan
Josh chats with Daniel and Stefan from curl about their summer of bliss. Curl stopped taking vulnerability reports for a month and nothing much happened really. Daniel and Stefan have a really pragmatic view of all the new LLM powered vulnerability detection tools. The cost of finding a vulnerability has dropped dramatically, but the cost of fixing those bugs hasn't changed. Taking some time off i
CRA vulnerability reporting with Daniel Thompson
Josh welcomes back Daniel Thompson to explain what just happened regarding vulnerability reporting and the CRA on September 11. The very first CRA requirements kicked in, but what does it really mean? Daniel explains it's not too bad. There are plenty more requirements coming, but this one feels very approachable. The show notes and blog post for this episode can be found at https://opensourcesecu
Finding difficult vulnerabilities with Jaya Baloo from AISLE
Josh chats with Jaya Baloo from AISLE about their vulnerability scanner. If you follow open source vulnerabilities AISLE is a name you've seen popping up recently. They have a vulnerability scanner that is outperforming most of the existing scanners like Mythos. Jaya gives us some insight into how this all works and why they're different. We also learn about some scary new attacks that can be cond
Sovereign Tech Agency with Erik Möller
Josh chats with Erik Möller from the Sovereign Tech Agency about what they're doing. The Sovereign Tech Agency is doing some amazing work around funding open source maintainers and projects. Eric breaks down what they're doing, how it works, and how you can apply for funding. We even learn about some similar projects happening in the EU. Hopefully in the near future we will see the work Sovereign
CVEs vs Advisories with Paul Asadoorian
Josh chats with Paul Asadoorian about a tool he wrote called fettle and a recent report Paul published on CVEs. Fettle is a tool to help update and manage Linux systems. The big sell on this one is checking if your firmware is out of date. We then talk about a report Paul created that doesn't obsess over CVEs, but rather the vendor updates. It makes more sense to worry about advisories as those ar
Maintaining EOL Open Source with Commonhaus and HeroDevs
Josh chats with Erin Schnabel and Rob Nalen about a new effort from Commonhaus and HeroDevs for maintaining end of life open source. This project, the Open Source Sustainability Initiative is a clever way to bring corporations and projects together for maintenance of new and old versions of open source projects. This is pretty new territory for everyone, this project is worth keeping an eye on bec
Cleanup, Speedup, Levelup open source at e18e
Josh chats with James from e18e. This is a project that is working on improving Javascript packages by cleaning up, speeding up, and leveling up the dependencies. The way the e18e project handles this work is very human open source. It's all about building up connections and trust with the package communities, which is no small effort. James fills us in on what they're doing as well as how we can
VulnCheck's State of Exploitation Report with Patrick Garrity
Josh chats with Patrick Garrity about the VulnCheck State of Exploitation 1H-2026 report. Patrick explains the current trends we are seeing around vulnerabilities right now. While the number of CVEs is way up, the number of actually exploited vulnerabilities isn't growing year over year. This tells us there is a lot of FUD and hype. We also ask where are all the vulnerabilities that project Glassw
Securing critical infrastructure with Josh Corman
Open Source Security welcomes Josh Corman to talk about the challenges around securing our critical infrastructure. Specifically the discussion centers around our water supplies. There are a lot of really wild things happening right now with attacks like Volt Typhoon and Salt Typhoon. Josh has an amazing ability to make these sort of discussions easy to understand without spreading FUD. Josh also
Abandoned open source with Josh Marpet
Josh welcomes Josh Marpet for a discussion about abandoned open source packages. Josh Marpet has a foundation called Value Chain Risk Institute that has a report discussion how to start measuring if an open source package might be abandoned. There's a lot of data, but not a lot of groups using that data to help make informed decisions about using open source. VCRI is one of those places that's sta
Red Hat's Project Lightwell with Mo Duffy
Josh welcomes Mo Duffy from Red Hat to chat about project Lightwell. The idea is to leverage the resources and understanding Red Hat has built up over the years to help deal with the deluge of vulnerability reports that are overwhelming open source projects. Mo does a really good job of explaining why this is fundamentally a people problem, not a technology problem. But it's a people problem we ca
Rust Foundation Maintainers Fund with Lori and Niko
Josh chats with Lori Lorusso and Niko Matsakis about the Rust Foundation Maintainers Fund. This is a new project the Rust Foundation has create to help fund Rust maintainers. It's a great discussion where Lori and Niko cover all the ways they expect to fund the maintainers which is never as easy as one initially expects. Funding open source is a huge topic right now, it sounds like the Rust Founda
AIBOM, CBOM, and HBOM with Allan Friedman
Josh chats with Allan Friedman about all things Bill of Materials. Allan did a ton of work to help turn SBOM into what it is today. He has many thoughts and ideas around the new types of BOMs, a concept he's calling the OmniBOM. Allan is always fun to chat with and he brings a ton of knowledge and advice. The show notes and blog post for this episode can be found at https://opensourcesecurity.io/2
Packagist and Composer security with Jordi Boggiano
Josh welcomes Jordi Boggiano the lead maintainer of Composer and Packagist to explain the truckload of security features they've recently added. Packagist is the PHP package registry, Composer is the dependency manager for PHP. Recently the people behind these projects have added a number of security features that will improve the security of the entire ecosystem. Jordi explains it all to us and g
Sustaining Open VSX with Mike and Thabang
Josh welcomes Mike Milinkovich and Thabang Mashologu from the Eclipse Foundation to talk about their new managed Open VSX registry. This is the first open source package registry to create a commercial operation for large company users to help fund the registry. We discuss how we got here, what's actually going on, and why this commercial approach is working. Everyone knew this day would come, and
Hacking your CI/CD with François Proulx
Josh welcomes back François Proulx to talk about the absolute madness in the CI/CD universe right now. We also learn about François' new project SmokedMeat which is a tool to help you hack your own CI/CD. When Josh spoke to François a year ago, the world was a very different place than it is today. François has a ton of knowledge about how we got here and what we can do moving forward. Boost Secur
Open source verification with Sal Kimmich
Josh chats with Sal Kimmich about the current state of everything, and what we can expect next. Sal has some incredible insight into what we can expect to see due to the current wave of security bugs and incidents. There are some new features we will need in both our hardware and software to ward off the state of things. Since those features are years away, what we need in the short term is shorin
Vulnerability disclosure with Casey Ellis
Josh talks to Casey Ellis about why vulnerability disclosure is so hard, and also so important. Casey is one of the best in this space having been a Bugcrowd founder. There are few people with more experience and insight into how a security vulnerability should be handled, and why the explosion of AI is making all this much harder than it's ever been before. While finding vulnerabilities is easy,
F-Droid the open app store with Hans
Josh talks to Hans-Christoph Steiner about F-Droid, the Free and Open Source Android App Repository. The way F-Droid works looks a lot like a Linux distribution which has some interesting security challenges, but also some great security benefits. Hans walks us through the current state of open app repositories and also what the future currently looks like. There are more open phones than ever bef
Open source is critical infrastructure with Kat Cosgrove
Josh talks to Kat Cosgrove about a how companies should be treating open source more like their critical infrastructure than free stuff. Kat has a ton of knowledge about how the interactions between companies and open source communities can work well, or not work at all. Kat's time on the Kubernetes Release Team. We touch on how a project like Kubernetes is super successful, while another, Ingress
How to actually test a disaster plan with David Bernstein
Josh and David finish up the disaster recovery and emergency planning trilogy. In this one David tells us how to test the plan he told us how to build in the last episode. There are some great ideas in this one about how to test the process not the people. How to construct the plan, and even some tips to go from a plan to some actual real world testing. It's another episode filled with great and p
Open Source Pledge with Vlad-Stefan Harbuz
Josh has a discussion with Vlad-Stefan Harbuz about the Open Source Pledge as well as his recent FOSDEM talk. The Open Source Pledge is all about trying to build a sustainable universe for open source maintainers. This ties into Vlad's FOSDEM talk which was all about the challenge of just knowing what open source you are using. The importance of trying to make open source sustainable is a really i
Building a plan for disaster with David Bernstein
Josh welcomes back David Bernstein to talk about creating a disaster recover plan. It's a very timely topic given all the current events. There are more supply chain attacks and compromises than ever before. There are some great resources for this planning, but as David tells us, it's really not that hard to put some plans together. It's easy to over-plan, David gives some great tips on getting st
Open Source Malware with Paul McCarty
Josh talks to Paul McCarty of Open Source Malware about ... open source malware. Paul explains why there aren't many good open source malware datasets. We discuss why the existing data is lacking for many use cases. We of course touch on AI and the malware in skills problems and challenges. It's a fun discussion with a lot of new and interesting problems we all have to deal with. The show notes an
Package management challenges with Andrew Nesbitt
Josh welcomes back Andrew Nesbitt to discuss some recent blog posts he wrote about the challenges of new ecosystems as well as challenges of no ecosystems like C. There aren't very many people who look at multiple ecosystems in the way Andrew does. He has thoughts on why it's so hard to create a new ecosystem as well as some of the reasons we don't see a C language ecosystem. Andrew has a ton of i
Open Source Security at scale with Michael Winser
Josh talks to Michael Winser about a talk he gave at FOSDEM as well as his work on Alpha Omega at the Linux Foundation. Michael is approaching open source security in a way that nobody has ever tried before. What if we could fund some really big, really hard projects? It's not cheap or easy, but he's getting it done. We spend a lot of the time discussing package registries, which are a huge topic.
2026 State of the Software Supply Chain with Brian Fox
Josh chats with Brian Fox from Sonatype about their 2026 State of the Software Supply Chain report. Most of the number continue to grow at alarming rates, but there's some new interesting findings in this one. We discuss end of life and open source which is tough to define. We touch on what using AI with open source dependencies looks like (and why it's broken), and we discuss the challenge of upg
MCP and Agent security with Luke Hinds
Josh talks to Luke Hinds, CEO of Always Further, about MCP and agent security. We start out talking about Luke's new tool, nono which is a sandboxing tool that has AI agents in mind as a use case. We explain what MCP and agents are doing as well as why it's so hard to secure them. It's not impossible, but it's not simple either. We end the show by discussing some of the more human aspects to secur
The State of OpenSSL for pyca/cryptography with Alex Gaynor and Paul Kehrer
Josh talks to Paul Kehrer and Alex Gaynor, from the Python Cryptographic Authority. Alex and Paul recently published a statement discuss the challenges posed by modern OpenSSL. We discuss the statement and their relationship with OpenSSL. We chat about some of the current features in cryptography, as well as some of what's coming in the future. It's a fun conversation that hits on a lot of great p
Rust coreutils with Sylvestre Ledru
Josh talks to Sylvestre Ledru about the Rust coreutils project. We've been using GNU coreutils for decades now, and the goal of Rust coreutils is to rewrite these utilities in Rust. The primary reason isn't security, it's to modernize the code and attract new contributors. Sylvestre discusses with quite pleasant relationship with the GNU coreutils developers, some of the challenges in the project.
Goose and the Agentic AI Foundation with Brad Axen
Josh chats with Brad Axen from Block about his creation Goose as well as the Agentic AI Foundation (AAIF). I am quite skeptical of many AI claims, but Brad has a very pragmatic view about where things are today and where we might see them head. Donating Goose to the AAIF is great news as well as seeing MCP and AGENTS.MD in the foundation. We discuss how to deal with the problem of raising up junio
The Global Vulnerability Intelligence Platform with Olle E. Johansson
Josh chats with Olle E. Johansson about the Global Vulnerability Intelligence Platform (GVIP). It's no secret the current vulnerability systems are reaching a breaking point. Olle is one of the few people with a long term vision instead of trying to just fix the short term problems. His GVIP ideas are very good, but it's a community effort and needs our help. Give it a listen and if it sounds inte
Digital Sovereignty and Nextcloud with Frank Karlitschek
Josh talk to the founder and CEO of Nextcloud, Frank Karlitschek about digital sovereignty. There's a lot of attention lately around digital sovereignty and often that conversation also includes Nextcloud. Frank tells us all about how Nextcloud works, how it can be used to free your data, and has some great insight into what decentralization already looks like and what it could look like soon. The
The Art of Crisis Management with David Bernstein
Josh talks to David Bernstein about the world of crisis management and business continuity. David is a certified emergency manager and tell us about preparing for both digital and physical disruptions. Everything is IT now, so the way we think about disaster preparedness is changing. We talk about understanding risks, creating plans, and the role of practice in the world of crisis management. This
WTF is a passkey with William Brown
William Brown is back! This time Josh chats with him about Passkeys. WTF are they? A Passkey is a form of multi factor authentication, but it's not super obvious what that really means. William does a fantastic job explaining what a Passkey is, how we got to where we are today with Passkeys. He shares a ton of explanations about the whole world of authentication along the way. Some of this stuff i
All about Suricata with Victor Julien
Josh discusses Suricata with Victor Julien, the founder and lead developer of the project. Victor explains the history of the project, its impact on cybersecurity, and the community that keeps it all running. Challenges like encrypted traffic and the evolution of open-source projects. Victor even gives us a glimpse into what he sees as the future of the project. There's a lot to learn about Surica
Iocaine poisons bots with Gergely Nagy
Josh talks to Gergely Nagy (algernon) about his tool Iocaine. Iocaine creates a maze to trap scraping bots in a world a fake pages they cannot escape. algernon tells us how Iocaine effectively traps bots by serving them endless loops of nonsensical URLs and web pages. It's an extremely clever tool that's designed to be completely hidden from normal users, but not hidden to the scrapers. The show n
Anubis with Xe Iaso
Josh chats with Xe Iaso, the creator of Anubis the web AI firewall. We discuss how Anubis is tackling bots and scrapers. The discussion around the scrapers is fascinating and challenging, these things are everywhere and don't behave very nicely. There's also discussion about running a successful open source project. Xe has a lot of experience to share with us, you're going to learn something new w
Rustls with Dirkjan and Joe
Josh talk to Dirkjan and Joe about Rustls (pronounced rustles), a Rust-based TLS library. Dirkjan and Joe are developers on Rustls. We talk about the history that got us to this point. The many many challenges in writing a TLS library (Rust or not). We also chat about some of what's to come. Rustls has an OpenSSL compatibility layer which makes is a really interesting project. The show notes and b
Daniel Thompson answers: Does the CRA apply to Santa?
Josh welcomes back Daniel Thompson explore the rather silly question of whether Santa Claus needs to be compliant with the Cyber Resilience Act (CRA). This episode was intended to be silly, but it ended up being an incredibly interesting conversation. Daniel explained a great deal about how the CRA works and how it could apply to Santa Claus. The TL;DR is even if he's giving out free stuff, the CR
Linux Foundation Europe with Gabriele Columbro
Josh has a chat with Gabriele Columbro, Executive Director of the Fintech Open Source Foundation and General Manager of Linux Foundation Europe. We of course discuss the Cyber Resilience Act (CRA), the evolving landscape of open source regulation, and the collaborative efforts of major foundations. Open source is everywhere, but there's also a ton of work to do now. Gabriele has really good insigh
Updating open source dependencies with Jamie Tanna
Josh discusses updating open source dependencies with Jamie Tanna. Jamie works on Renovate which gives them a lot of insight into the challenges of keeping your open source updated. We discuss the challenges of semantic versioning, supply chain security, and AI-generated code. If you're new or old to the world of open source dependencies, there's something to learn from this chat. The show notes a
TARmageddon with Alex Zenla
Josh discusses the TARmageddon vulnerability with Alex Zenla, CTO of Edera. In this episode, we explore the discovery of the TARmageddon vulnerability. It's especially interesting because it's Rust, but also involves multiple end of life crates. Alex shares the story of how Edera managed to figure all this out (it was not simple). Hard problems are still hard, but there's a lot of lessons in this
Python Security with Seth Larson
In this episode Seth Larson gives us a cornucopia of topics relating to Python security. Seth discusses the Python Software Foundation's decision to reject a significant grant NSF. Diversity is a big deal to python, so this was a no brainier. We discuss the upcoming PyCon US conference, featuring a new security track that fosters collaboration between developers and security experts. Josh is a hug
Linux Vendor Firmware Service with Richard Hughes
Josh talks to Richard Hughes about the world of firmware. We cover how Richard's journey from developing the ColorHug led to the creation of the Linux Vendor Firmware Service (LVFS), changing how firmware updates are managed for nearly every Linux user. Updating firmware has always been dicey, and on Linux it used to be impossible. Richard helps us understand how this all works and how we can all
NPM supply chain attacks with Charlie Eriksen
Josh chats with Charlie Eriksen, a security researcher at Aikido Security. We discuss the recent NPM supply chain attacks that affect hundreds of packages. Charlie shares his experiences dealing with recent security breaches, the challenges of maintaining trust in open source software, and the importance of proactive measures to safeguard open source. The rapid pace of change is impacting our secu
Detecting XZ in Debian with Otto Kekäläinen
In this episode, Josh and Otto dive into the world of Debian packaging, exploring the challenges of supply chain security and the importance of transparency in open source projects. They discuss Otto's blog post about the XZ backdoor and how it's a nearly impossible attack to detect. Otto does a great job breaking down an incredibly complex problem into understandable pieces. The show notes and bl
Eclipse Foundation SBOMs with Mikael Barbero
In this conversation, Josh speaks with Mikael Barbero, head of security at the Eclipse Foundation. They discuss the foundation's role in enhancing the security posture of open source projects, the importance of Software Bill of Materials (SBOMs), and the various security services provided to projects. Mikael explains the challenges and strategies involved in implementing security best practices ac
Actually finding vulnerabilities using AI with Joshua Rogers
I chat with Joshua Rogers about a blog post he wrote as well as some bugs he submitted to the curl project. Joshua explains how he went searching for some AI tools to help find security bugs, and found out they can work, if you're a competent human. We discuss the challenges of finding effective tools, the importance of human oversight in triaging vulnerabilities, and how to submit those bugs to o
Sustaining Package Repositories with Brian Fox
Brian Fox discusses the challenges and future of open source package repository infrastructure. We discuss the complexities of managing public registries, the impact of overconsumption, and the importance of sustainable practices in the open source community. Brian tells us how organizations can reduce their footprint and contribute to a more balanced ecosystem. The package repositories cannot con
Arch Linux Security with Foxboron and Anthraxx
Join us for a conversation with Foxboron (Morten Linderud) and Anthraxx (Levente Polyak), members of the Arch Linux security team. We talk about the difficulties of maintaining a Linux distribution, the challenges of handling CVEs, and the dedication of volunteers who keep the open-source community working (and how overworked those volunteers are). We explain what makes Arch a little different, ho
OpenSSL with Hana Andersen and Anton Arapov
I discuss all things OpenSSL with Hana Andersen and Anton Arapov from the OpenSSL Corporation. Discover the intricacies of organizing the first-ever OpenSSL conference in Prague, the importance of post-quantum cryptography, and the evolution of OpenSSL from a small team to a global community. Whether you're a seasoned cryptographer or just curious about the future of secure communications, this ep
The Python Software Foundation with Deb Nicholson
In this episode I discuss the Python Software Foundation with Deb Nicholson. We discuss their contributions to the Python programming community. Learn how this dedicated organization supports the growth and innovation of Python, fostering an ecosystem for developers worldwide. Everything funding open-source projects to organizing community events, discover the initiatives that make the Python Soft
Using Mercator to map assets with Didier Barzin
In this episode, we the information system mapping tool Mercator with Didier Barzin, a CISO at a hospital in Luxembourg. Discover how Mercator revolutionizes the way organizations map their complex information systems. From hospitals to universities and even the banking sector. Mercator helps manage and protect vast networks by creating dynamic, comprehensive maps that replace outdated Excel sheet
Talos Linux security with Andrey Smirnov
In this episode, I discuss into the security features of Talos Linux with Andrey Smirnov. Andrey explains how Talos focuses on its immutability and minimal attack surface. Discover how these enhancements fortify your systems against vulnerabilities, ensuring a secure and resilient infrastructure. Join us as we explore the security advancements that make Talos Linux not only a super easy way to run
Discussing the Open Source, Open Threats? paper with Behzad and Ali
In this episode I chat with the authors of a recent paper on open source security: Open Source, Open Threats? Investigating Security Challenges in Open-Source Software. I chat with Ali Akhavani and Behzad Ousat about their findings. There are interesting data points in the paper such as a 98% increase in reported vulnerabilities compared to a 25% growth in open source ecosystems. We discuss the ch
crates.io trusted publishing with Tobias Bieniek
In this episode we discuss crates.io trusted publishing with Tobias Bieniek. We cover the steps crates.io is taking to enhance supply chain security through trusted publishing, a method that leverages short-lived tokens and GitHub actions to safeguard against unauthorized access. Tobias shares insights into the challenges of managing a large-scale open-source repository, offering a glimpse into th
CVE update with Patrick Garrity
In this episode I chat with Patrick Garrity from VulnCheck. We discuss the chaos that has enveloped the CVE and NVD programs over the past two years. We cover some of the transparency and communication challenges with the existing program. What some of the new things that have started to emerge as well as why they seem to be struggling. We end on the note that the last 3 months haven't been confid
GCVE with Cédric Bonhomme and Alexandre Dulaunoy
In this episode I discuss GCVE and Vulnerability-Lookup with Alex and Cedric from CIRCL. GCVE offers a decentralized approach, allowing organizations to assign their own IDs and publish vulnerabilities independently. Vulnerability-Lookup is the tool that makes GCVE a reality. The flexibility addresses many of the limitations we see today with a single centralized ID system. The work happening by C
EU Regulations will change everything with Daniel Thompson
In this episode, we dive into the Product Liability Directive and Cyber Resilience Act with Daniel Thompson, CEO of Crab Nebula. The EU's new legislative framework impacts manufacturers in ways we don't totally understand, but are going to bring substantial changes to how companies use and develop open source. Daniel explains the broader implications for software security and the future of digital
Open source microprocessors with Jan Pleskac
In this episode Jan Pleskac, CEO and co-founder of Tropic Square, shares insights on the challenges and innovations in creating open and auditable hardware. While most hardware is very closed, Tropic Square is working to change this. WE discuss how open source can enhance security, the complexities of integrating third-party technologies, and the future of secure computing devices. The show notes
Package URLs with Philippe Ombredanne
I'm joined by Philippe Ombredanne, creator of the Package URL (PURL), to discuss the surprisingly complex and messy problem of simply identifying open source software packages. We dive into how PURLs provide a universal, common-sense standard that is becoming essential for the future of SBOMs and securing the software supply chain. The show notes and blog post for this episode can be found at htt
Hobbyist Maintainers with Thomas DePierre
Thomas DePierre joins Open Source Security to discuss the central idea from his blog post, "You are all on the hobbyist maintainers turf now," exploring the massive disconnect between the corporate world that consumes open source and the hobbyist community that actually produces it. The conversation reveals this isn't a new problem, but a long-standing reality whose consequences for security, stab
STIG automation with Aaron Lippold
I chat with Aaron Lippold, creator of MITRE's Security Automation Framework (SAF), to discuss how to escape the pain of manual STIG compliance. We explore the technical details of open-source tools like InSpec, Heimdall, and Vulcan that automate validation, normalize diverse security data, and streamline the entire security authoring process. The show notes and blog post for this episode can be fo
Ecosyste.ms with Andrew Nesbitt
I recently chatted with Andrew Nesbitt about his project, Ecosyste.ms. Ecosyste.ms catalogs open source projects by tracking packages, dependencies, repositories, and more. With this dataset Andrew is able to incredible insights into the world of open source. We chat all about how Ecosyste.ms works and how he manages to wrangle all this data. The show notes and blog post for this episode can be fo
Curl vs AI with Daniel Stenberg
Daniel Stenberg, the maintainer of Curl, discusses the increase in AI security reports that are wasting the time of maintainers. We discuss Curl's new policy of banning the bad actors while establishing some pretty sane AI usage guidelines. We chat about how this low-effort, high-impact abuse pattern is a denial-of-service attack on the curl project (and other open source projects too). The show n
Repository signing with Kairo De Araujo
I recently had a chat with Kairo about a project he maintains called Repository Service for TUF (RSTUF). We explain why TUF is tough (har har har), what RSTUF can do, and some of the challenges around securing repositories. The show notes and blog post for this episode can be found at https://opensourcesecurity.io/2025/2025-05-rstuf-with-kairo-de-araujo/
Securing GitHub Actions with William Woodruff
William Woodruff discussed his project, Zizmor, a security linter designed to help developers identify and fix vulnerabilities within their GitHub Actions workflows. This tool addresses inherent security risks in GitHub Actions, such as injection vulnerabilities, permission issues, and mutable tags, by providing static analysis and remediation guidance. Fresh off the heels of the tj-actions/change
Embedded Security with Paul Asadoorian
Recently, I had the pleasure of chatting with Paul Asadoorian, Principal Security Researcher at Eclypsium and the host of the legendary Paul's Security Weekly podcast. Our conversation dove into the often-murky waters of embedded systems and the Internet of Things (IoT), sparked by a specific vulnerability discussion on Paul's show concerning reference code for the popular ESP32 microcontroller. T
tj-actions with Endor Lab's Dimitri Stiliadis
Dimitri Stiliadis, CTO from Endor Labs, discusses the recent tj-actions/changed-files supply chain attack, where a compromised GitHub Action exposed CI/CD secrets. We explore the impressive multi-stage attack vector and the broader often-overlooked vulnerabilities in our CI/CD pipelines, emphasizing the need to treat these build systems with production-level security rigor instead of ignoring them
Syft, Grype, and Grant with Alan Pope
I chat with Alan Pope about the open source security tools Syft, Grype, and Grant. These tools help create Software Bills of Materials (SBOMs) and scan for vulnerabilities. Learn why generating and storing SBOMs is crucial for understanding your software supply chain and quickly responding to new threats like Log4Shell. The show notes and blog post for this episode can be found at https://opensou
CVE for EOL with Aaron Frost
Aaron Frost explores the overly complex world of vulnerability identifiers for end of life software. We discuss how incomplete CVE reporting creates blind spots for users while arming attackers with knowledge. The conversation uncovers the ethical tensions between resource constraints and security transparency, highlighting why the "vulnerable until proven otherwise" approach is the best path forw
cargo-semver-checks with Predrag Gruevski
Cargo Semver Checks is a Rust tool by Predrag Gruevski that is tackling the problem of broken dependencies that cost developers time when trying to upgrade dependencies. Predrag's work shows how automated checks can catch breaking changes before they're released, potentially saving projects from unexpected failures and making dependency updates less painful across the entire Rust ecosystem. The sh
Distributed CI and Git with Lars Wirzenius
Lars Wirzenius discusses his innovative CI/CD system Ambient, which uses isolated virtual machines without network access to enhance security, and his work on Radicle, a peer-to-peer Git collaboration platform. Together, these projects offer a glimpse into a more distributed future for software development, addressing key challenges in current CI/CD systems like long wait times, security vulnerabi
FIDO authentication with William Brown
William Brown tells us all about how confusing and complicated the FIDO authentication universe is. He talks about WebAuthn implementation challenges to flaws in the FIDO metadata service that affect how hardware tokens are authenticated against. The conversation covers the spectrum of hardware security key quality, attestation mechanisms, and the barriers preventing open source developers from im
CRA with Luis Villa
In this episode, open source legal expert Luis Villa breaks down what the EU's Cyber Resilience Act means for developers and businesses, exploring carve-outs for individual contributors and the complex relationship between security and sustainability. Luis provides practical guidance on navigating this evolving regulatory landscape while explaining why the CRA represents both a challenge and an op
Open Source Malware with Brian Fox
Brian Fox discusses findings from a recent Sonatype report about the growing challenge of malicious packages in open source repositories. At the time of recording there are now over 820,000 malware packages in public repositories. Brian explains why certain ecosystems are more vulnerable than others and how behavioral detection methods can identify suspicious packages, and the challenge in solving
Open Source Foundations with Kelley Misata of Suricata
In this episode Open Source Security talks to Dr. Kelly Masada about the Open Information Security Foundation (OISF). The way OISF is managing Suricata through a foundation is super interesting. There are a lot of lessons in this one for both open source projects and existing open source foundations. The blog post for this episode can be found at https://opensourcesecurity.io/2025/2025-03-
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