CVE-2026-54055
Last modified
CVE-2026-54055 is a medium-severity vulnerability rated 5/10 on the CVSS scale. 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. EPSS estimates a 0.07% chance of exploitation in the next 30 days.
Description
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Kovidgoyal | Kitty | < 0.47.2 |
References
- https://github.com/kovidgoyal/kitty/security/advisories/GHSA-q446-x7q6-vcxhMitigation, Vendor Advisory
- https://github.com/kovidgoyal/kitty/security/advisories/GHSA-q446-x7q6-vcxhMitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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