CVE-2026-54055
5.0
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:L
Exploitability: 0.8 / Impact: 4.2
Source: security-advisories@github.com (Secondary)
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.
Affected (1)
Products: Kovidgoyal: Kitty
Configuration A
| Vulnerable Software | Affected Versions |
|---|---|
| Before 0.47.2 |
Related CWEs
CWE-367
Time-of-check Time-of-use (TOCTOU) Race Condition
The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.
CWE-426
Untrusted Search Path
The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control.
CWE-59
Improper Link Resolution Before File Access ('Link Following')
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
References (2)
Source: security-advisories@github.com
MitigationVendor Advisory
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
MitigationVendor Advisory
Timeline
No history available yet.