CVE-2026-54055
Severity CVSS v4.0:
Pending analysis
Type:
CWE-59
Link Following
Publication date:
12/06/2026
Last modified:
12/06/2026
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.
Impact
Base Score 3.x
5.00
Severity 3.x
MEDIUM