Vulnerability in Tox-Dev Filelock
CVE-2026-112941
filelock is a platform-independent file lock for Python. From 4.1.0 until 4.2.1, SoftReadWriteLock and AsyncSoftReadWriteLock cache a successful check of the <path>.rw lock tree and resolve its names again during later record operations, allowing another local user who can replace that tree after the first acquisition to redirect lock-record writes into directories writable by the lock user. This issue is fixed in version 4.2.1.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
Published .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Tox-Dev Filelock — versions >= 4.1.0, < 4.2.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-112941?
- CVE-2026-112941 is a low-severity vulnerability in Tox-Dev Filelock, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 3.3/10. Published 2026-10-20.
- How severe is CVE-2026-112941?
- Low severity. CVSS v3 base score is 3.3 out of 10.