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AI Coding Agents Exploit Open-Source Bugs Within Minutes of Patch

AI Coding Agents Exploit Open-Source Bugs Within Minutes of Patch

ATLAS OWASP HIGH Significant risk · Prioritise patching ▲ 8.2 Simon Willison

AI-powered coding agents are now capable of identifying and probing exploitable vulnerabilities in open-source software within minutes of a patch or advisory being publicly shared, fundamentally breaking traditional embargo-based disclosure practices. Security maintainers for projects including OCaml and rclone are reporting unprecedented surges in automated exploit attempts and vulnerability reports, with rclone seeing over 40 disclosures in a single month compared to 20 across its first decade. This development signals a systemic shift in the threat landscape where AI agents act as force multipliers for attackers, compressing the window between disclosure and active exploitation to near-zero.

Claude Mythos Generates Working Exploits for Firefox, Windows

Claude Mythos Generates Working Exploits for Firefox, Windows

ATLAS OWASP CRITICAL Active exploitation · Immediate action required ▲ 9.2 SecurityWeek

Anthropic's Claude Mythos Preview model demonstrated the ability to generate functional proof-of-concept exploits targeting known Firefox and Windows vulnerabilities within minutes to hours, compressing the traditional patch gap window dramatically. Testing also revealed that public Anthropic models with safety guardrails disabled could produce working exploits, though at a lower success rate than Mythos. The findings underscore how frontier LLMs are shifting the threat landscape for unpatched N-day vulnerabilities by automating and accelerating exploit development previously bottlenecked by scarce reverse engineering expertise.

Anthropic Mythos AI Achieves 72% Autonomous Exploit Success

Anthropic Mythos AI Achieves 72% Autonomous Exploit Success

ATLAS OWASP CRITICAL Active exploitation · Immediate action required ▲ 9.2 The Hacker News

Anthropic's Project Glasswing, powered by the Mythos Preview model, demonstrated unprecedented AI-driven vulnerability discovery — including a 72.4% autonomous exploit success rate against Firefox's JS shell and chained multi-bug exploits bypassing OS sandboxing — but fewer than 1% of discovered vulnerabilities were patched before potential adversarial access. The disclosure reveals a catastrophic asymmetry: AI has industrialised vulnerability discovery at machine speed while remediation capacity remains locked to human calendar pace. Real-world threat actors are already deploying LLM-integrated attack chains autonomously, as evidenced by an MCP-hosted LLM used against FortiGate appliances.

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