Medium 4.7Published Oct 20, 2026

CVE-2026-112906filelock: SoftFileLock evicts a fresh lock file whose watched age another local user's pre-dated file passed on through inode reuse

Updated under an hour ago (2026-10-21 08:20 UTC)

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It affects tox-dev filelock. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for tox-dev filelock

Exploited in the last 30 days

filelock is a platform-independent file lock for Python. From 4.1.0 until 4.2.1, SoftFileLock versions from 4.1.0 can reuse a stale observation when an attacker pre-dates and removes its own marker, at least two lock-user processes are waiting, coarse or matching modification times preserve the observation, and an honest contender creates a fresh marker on the reused inode, causing that live marker to be removed as stale. This issue is fixed in version 4.2.1.

CVSS: 4.7 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
Weakness (CWE): CWE-694
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Undergoing Analysis
Record last updated: Oct 20, 2026
First seen by InfoSec Signals: Oct 20, 2026

Affected products

Affected products

tox-dev filelock tox_dev:filelock (from the name)	from 4.1.0, < 4.2.1	CNA record

References

https://github.com/tox-dev/filelock/security/advisories/GHSA-2g95-wg33-c5x2x-refsource-confirm
https://github.com/tox-dev/filelock/commit/740ff666b62a88496c8d7394e4e6230605e4d62bx-refsource-misc
https://github.com/tox-dev/filelock/releases/tag/4.2.1x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.