open_actions.py in kitty before 0.41.0 does not ask for user confirmation before running a local executable file that may have been linked from an untrusted document (e.g., a document opened in KDE ghostwriter).
https://hitman.services/cve-2025-43929/
https://github.com/kovidgoyal/kitty/compare/v0.40.1...v0.41.0
https://github.com/kovidgoyal/kitty/commit/ce5cfdd9caf44c538af800a07162e1f49bd53c35