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The Hacker News AI Security · October 30, 2026

Cursor extension compromise: check both affected versions and persistent SSH access

news Agent SecurityAI Engineering
Why it matters

Cursor’s October 30 update identifies modified Claude Code extensions 2.1.312 and 2.1.313 for macOS and Windows distributed through its marketplace on October 29. The payload added an SSH key, installed persistence and reported host details. SSH setup often failed without elevated privileges. Cursor says it removed the packages and disabled the attacker server; uninstalling alone may leave persistence.

My takeaway: Check extension provenance and installation times against Cursor’s notice, then inspect its package hashes, SSH key and persistence indicators. Isolate hosts with execution evidence and assess rebuilding. Remove residual tasks, agents and tunnels, and rotate reachable credentials from a clean system. A failed SSH setup or a missing key alone does not establish that the host was unaffected.
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