CVE-2026-26268: Cursor sandbox escape via writing .git configuration

Summary

CVE-2026-26268 affects Cursor, a code editor built for programming with AI, in versions prior to 2.5. A malicious agent, for example through prompt injection, could write to improperly protected .git settings, including git hooks, enabling out-of-sandbox RCE the next time they are triggered. No user interaction is required because Git executes these commands automatically.

Mitigation

Fixed in version 2.5.

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