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The Cybersecurity Defenders Podcast

The Cybersecurity Defenders Podcast

LimaCharlie 346 Episodes Oct 1, 2026

An accessible yet technical podcast that explores cybersecurity and the people working to keep the internet safe. Each episode is structured into segments: a look back at recent cybersecurity news, conversations with industry experts, a breakdown of adversary tactics, techniques, and procedures (TTPs), and a bit of hacker history. The show aims to make complex security topics understandable while still offering depth for practitioners.

Episodes

Securing AI agent identity and authority with Geoffrey Mattson [350]
Securing AI agent identity and authority with Geoffrey Mattson [350] Oct 1, 2026 1800 Today we're speaking with Geoffrey Mattson, CEO of SecureAuth, about identity and authority for AI agents: what changes when software stops being something a human uses and starts taking actions on its own.Geoffrey is a serial entrepreneur working at the intersection of cybersecurity and AI. Before SecureAuth he was CEO of Xage Security and co-founded MistNet.ai (acquired by LogRhythm), a
Physical AI and self-learning machines with Dr. Amarjot Singh [348]
Physical AI and self-learning machines with Dr. Amarjot Singh [348] Sep 16, 2026 2201 Today we're speaking with Dr. Amarjot Singh, Founder & CEO of Skylark Labs, about physical AI — what changes when a model leaves the server and has to perceive, decide and act inside a machine that moves through the real world.Dr. Singh earned his PhD in artificial intelligence and deep learning from the University of Cambridge, and has worked as a research fellow at Stanford Universi
Intel Chat: Claude models reached real systems, an AI safety resignation & ShieldCrash [347]
Intel Chat: Claude models reached real systems, an AI safety resignation & ShieldCrash [347] Sep 11, 2026 2071 Intel Chat with Matt Bromiley and Chris Luft.• An Anthropic researcher quits over where the race is heading. Jacob Coxon, who trains models on large amounts of data, is leaving both Anthropic and the AI industry: he believes the leading labs are racing toward self-improving systems they may not be able to control, and that competition will push them there anyway. Matt's problem with the g
Intel Chat: OpenAI's Astra hits Critical, DEF CON phishing, Philippine nuclear breach [346]
Intel Chat: OpenAI's Astra hits Critical, DEF CON phishing, Philippine nuclear breach [346] Sep 3, 2026 1979 Intel Chat with Matt Bromiley and Chris Luft.• OpenAI says Astra is the first of its models to reach the "Critical" cybersecurity capability level under its Preparedness Framework — the tier that means a model can independently find and exploit zero-days across well-defended systems, or run an end-to-end attack from a high-level instruction. Astra scored perfectly on ExploitBench, indepen
Intel Chat: AI patches fail, LiteLLM supply chain, Claude eval incidents & DPRK npm [345]
Intel Chat: AI patches fail, LiteLLM supply chain, Claude eval incidents & DPRK npm [345] Aug 14, 2026 2053 Intel Chat with Matt Bromiley and Chris Luft.• AI-generated patches fix vulnerabilities about half the time. 1Password's Off-By-1 team tested ChatGPT-5.5 and Opus 4.8 against six vulnerabilities: across 6,080 generated patches only 46% fixed the underlying flaw, and some that did were narrow enough to be bypassed. Separate Veracode research found a 56% security pass rate across 100+ model
Proving the value of security operations with Christopher Crowley [344]
Proving the value of security operations with Christopher Crowley [344] Aug 13, 2026 2535 Today we're speaking with Christopher Crowley, cybersecurity consultant through Montance and Senior Instructor with the SANS Institute, about the value of cybersecurity operations — how to measure it, how to express it to the business, and how AI is changing the work of the SOC.Christopher is a cybersecurity practitioner and educator focused on security operations, incident response, thre
Intel Chat: Shai-Hulud is back, model pinning & the token spend problem [343]
Intel Chat: Shai-Hulud is back, model pinning & the token spend problem [343] Aug 8, 2026 2141 Intel Chat with Matt Bromiley and Chris Luft — recorded in person at Black Hat USA in Las Vegas, day two.No prep doc, no script: just what Matt and Chris were actually hearing on the floor.• Shai-Hulud is back. The self-replicating npm worm returned on August 4, trojanizing the keyv / cacheable family and spreading to 400+ packages within hours. Chris reads through Datadog Security Labs'
Intel Chat: Hugging Face AI-agent breach, WP2Shell, Suno & Paidwork leaks, AWS Bahrain strike [342]
Intel Chat: Hugging Face AI-agent breach, WP2Shell, Suno & Paidwork leaks, AWS Bahrain strike [342] Jul 30, 2026 1815 Intel Chat with Matt Bromiley and Chris Luft.Matt and Chris break down four stories from the week in threat intel:• Hugging Face's security incident disclosure: an intrusion conducted end-to-end by an autonomous AI agent system — a malicious dataset exploiting two code-execution paths, thousands of actions across short-lived sandboxes, self-migrating C2 — and why the forensics had to run
Building trustworthy AI with Rob van der Veer [341]
Building trustworthy AI with Rob van der Veer [341] Jul 29, 2026 2107 Today we're speaking with Rob van der Veer, Chief AI Officer at Software Improvement Group, about how organizations can build trustworthy AI in an era of rapidly evolving technology and regulation — AI security, threat modeling, international standards, and the new challenges posed by agentic AI.Rob is a global leader in AI security, software engineering, and international AI standards, w
AI Chat: The Hugging Face / OpenAI breach — the attacker was the model [340]
AI Chat: The Hugging Face / OpenAI breach — the attacker was the model [340] Jul 23, 2026 2128 AI Chat with Maxime Lamothe-Brassard and Chris Luft — a special episode.One story, pulled apart start to finish. In mid-July 2026, Hugging Face disclosed a breach of its production infrastructure carried out end-to-end by an autonomous AI agent. Five days later, OpenAI revealed the attacker was its own models — GPT-5.6 Sol and a more capable unreleased model — which broke out of an intern
AI Chat: Grok CLI data exfiltration, AI vs. patching, distillation wars & shadow AI [339]
AI Chat: Grok CLI data exfiltration, AI vs. patching, distillation wars & shadow AI [339] Jul 14, 2026 1398 AI Chat with Maxime Lamothe-Brassard and Chris Luft.A new segment on the podcast: AI news in cybersecurity that is less than 24 hours old, discussed while it is still hot. Joining Chris for these conversations is LimaCharlie founder and CEO Maxime Lamothe-Brassard.In this episode:• Nipun Gupta (founder of Optimus Labs) reports that xAI's Grok Build CLI packaged and uploaded an entire loca
Intel Chat: Dialogflow Rogue Agent, ghost phishing, CISA KEV deadline & HalluSquatting [338]
Intel Chat: Dialogflow Rogue Agent, ghost phishing, CISA KEV deadline & HalluSquatting [338] Jul 9, 2026 2067 Intel Chat with Matt Bromiley and Chris Luft.Matt and Chris break down four stories from the week in threat intel:• Varonis Threat Labs' "Rogue Agent" — a permission boundary flaw in Google Dialogflow CX's Code Blocks feature that could let an attacker with a single permission (dialogflow.playbooks.update) inject persistent malicious code into a chatbot's execution pipeline and silently e

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