CVE-2026-112910: tox-dev filelock · Incorrect Permissions
Affects tox-dev filelockSource CVE Database V5
Not known to be exploited · CVSS 5.3 Medium : upgrade to 4.2.1 when convenient.
Data as of 5 Nov 2026, 22:33 UTC
Thin evidence
One scorer or none| CNA (GitHub_M) | CVSS 3.1 | 5.3 |
|---|
- Patch
- Available – fixed in 4.2.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:LExploitation evidence
Disclosed: evidence found.
CVE published 5 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Upgrade tox-dev filelock to 4.2.1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| tox-devfilelock | Affected
| Fixed in
|
AI-suggested
Upgrade the filelock package to version 4.2.1 or later, where this issue is fixed. No other mitigations are indicated or required as the vulnerability is resolved in the official patch.
Description
CVE-2026-112910 is a vulnerability in the tox-dev filelock Python package affecting versions from 3.10.0 up to but not including 4.2.1 on Windows. The issue arises because the mode argument is ignored when creating WindowsFileLock files and the ReadWriteLock SQLite database, causing these locks to inherit the parent directory's inheritable ACL instead of having owner-only permissions. This allows other local accounts with inherited access to read or modify lock-related files or interfere with lock acquisition. UnixFileLock is not affected, and mutual exclusion remains functional. The vulnerability is fixed in version 4.2.1.
References
- github.com/tox-dev/filelock/security/advisories/GHSA-8mx5-7m5m-r77g (opens in a new tab)
- github.com/tox-dev/filelock/pull/835 (opens in a new tab)
- github.com/tox-dev/filelock/commit/72786d41aa25159ad28c1bcf4291738b135b2c6c (opens in a new tab)
- github.com/tox-dev/filelock/commit/e1e825b1992f69fb6b346dc395d5ae4893536c0a (opens in a new tab)
- github.com/tox-dev/filelock/releases/tag/4.2.1 (opens in a new tab)