CVE-2026-54055

kitty: Kitty is a cross-platform GPU based terminal

CVE-2026-54055 is fixed in 3 products on 1 platform, first by kitty 0.32.2-1ubuntu0.4+esm2, released June 12, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
5.0
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0007
0th percentile

Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.2, a local privilege escalation vulnerability exists in kitty's file transmission protocol where a child process running in the terminal can write to arbitrary files on the filesystem by exploiting a TOCTOU (Time-of-Check-Time-of-Use) race condition between symlink validation and file creation. The `os.open()` call used to create files does not use `O_NOFOLLOW`, allowing an attacker to create a symlink between the initial stat check and the actual file open, causing the write to follow the symlink to an arbitrary destination. Version 0.47.2 fixes the issue.

Where it's fixed

ProductFixed inFixReleased
Linux
kitty · Debian 13.5 (trixie) 0.41.1-2+deb13u2 DEBIAN-CVE-2026-54055 Jun 24, 2026
kitty · Debian 14 0.47.3-1 DEBIAN-CVE-2026-54055 Jun 24, 2026
kitty · Ubuntu 24.04.5 LTS (noble) 0.32.2-1ubuntu0.4+esm2 kitty 0.32.2-1ubuntu0.4+esm2 Jun 12, 2026
kitty · Ubuntu 26.04.1 LTS (resolute) 0.45.0-1ubuntu0.1~esm2 kitty 0.45.0-1ubuntu0.1~esm2 Jun 12, 2026
kitty-shell-integration · Ubuntu 24.04.5 LTS (noble) 0.32.2-1ubuntu0.4+esm2 kitty-shell-integration 0.32.2-1ubuntu0.4+esm2 Jun 12, 2026
kitty-shell-integration · Ubuntu 26.04.1 LTS (resolute) 0.45.0-1ubuntu0.1~esm2 kitty-shell-integration 0.45.0-1ubuntu0.1~esm2 Jun 12, 2026
kitty-terminfo · Ubuntu 24.04.5 LTS (noble) 0.32.2-1ubuntu0.4+esm2 kitty-terminfo 0.32.2-1ubuntu0.4+esm2 Jun 12, 2026
kitty-terminfo · Ubuntu 26.04.1 LTS (resolute) 0.45.0-1ubuntu0.1~esm2 kitty-terminfo 0.45.0-1ubuntu0.1~esm2 Jun 12, 2026

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