CVE-2026-35355
uutils coreutils has a Time-of-Check to Time-of-Use (TOCTOU) race condition
6.3
MEDIUM
CVSS 3.1
EPSS 0.01%
Description
The install utility in uutils coreutils is vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition during file installation. The implementation unlinks an existing destination file and then recreates it using a path-based operation without the O_EXCL flag. A local attacker can exploit the window between the unlink and the subsequent creation to swap the path with a symbolic link, allowing them to redirect privileged writes to overwrite arbitrary system files.
How to fix CVE-2026-35355
To remediate CVE-2026-35355, upgrade the affected package to a fixed version below.
- —upgrade to 0.6.0 or later
- —no fix listed
Is CVE-2026-35355 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 0.6.0
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.3 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H |