Vulnerabilities · 184 days ago
Claude AI analyzed Vim and GNU Emacs source and generated proof-of-concept exploits that trigger code execution simply by opening a crafted file. A Calif researcher used Claude prompts to find missing modeline security checks in Vim; maintainers released a patch in Vim 9.2.0272. The Emacs issue remains unpatched because the Emacs developer points at Git for remediation. This demonstrates that AI assistants can both find vulnerabilities in source and iteratively produce working PoCs, lowering the bar for exploit development against widely installed editors.
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Vim and GNU Emacs: Claude Code helpfully found zero-day exploits for both
A simple prompt sent Claude Code on a mission that uncovered major security vulnerabilities in popular text editors — and then suggested ways to exploit them.
Claude AI finds Vim, Emacs RCE bugs that trigger on file open
Vulnerabilities in the Vim and GNU Emacs text editors, discovered using simple prompts with the Claude assistant, allow remote code execution simply by opening a file.
Part of the PlainSec briefing for 2026-04-01