CVE-2026-42851
Publication date 12 June 2026
Last updated 15 September 2026
Ubuntu priority
Description
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| kitty | 26.04 LTS resolute |
Fixed 0.45.0-1ubuntu0.1~esm2
|
| 24.04 LTS noble |
Fixed 0.32.2-1ubuntu0.4+esm2
|
|
| 22.04 LTS jammy |
Not affected
|
|
| 20.04 LTS focal |
Not affected
|
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CVSS version: CVSS v3.0
Base score
7.8 · High
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
Related Ubuntu Security Notices (USN)
- USN-8763-1
- kitty vulnerabilities
- 15 September 2026