Arbitrary Code Injection Affecting kitty package, versions <0.41.1-2+deb13u2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published9 Aug 2026
- disclosed12 Jun 2026
Introduced: 12 Jun 2026
CVE-2026-42851 (opens in a new tab)How to fix?
Upgrade Echo:latest kitty to version 0.41.1-2+deb13u2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kitty package and not the kitty package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.0, a program able to write bytes to a kitty terminal — a remote SSH peer, a downloaded file viewed with cat, a log line, an email body rendered in less, an issue body in a TUI, etc. — can cause kitty to execute attacker-supplied Python inside the running kitty process, with the user's full privileges. There is no approval prompt, no remote-control permission requirement, no shell-integration interaction, no clipboard touch, and no editor interaction. Version 0.47.0 fixes the issue.