A new exploit dubbed "Friendly Fire" demonstrates a critical vulnerability in AI coding agents like Claude Code and OpenAI's Codex. Researchers Boyan Milanov and Heidy Khlaaf from the AI Now Institute found that a single malicious payload could hijack Claude Sonnet 4.6, Claude Sonnet 5, Claude Opus 4.8, and Codex running GPT-5.5 without modification. The exploit works because these agents struggle to differentiate between code they are meant to analyze and malicious instructions, leading them to execute harmful code when tasked with inspecting external repositories. AI
IMPACT This exploit highlights a fundamental security flaw in AI coding agents, potentially leading to widespread compromise of code repositories and requiring new security paradigms beyond model updates.
RANK_REASON Security vulnerability discovered in AI coding tools.
- AI Now Institute
- Boyan Milanov
- Claude Code
- Claude Opus 4.8
- Claude Sonnet 4.6
- Claude Sonnet 5
- codex
- Friendly Fire
- GPT-5.5
- Heidy Khlaaf
- OpenAI
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