MediumVulnerabilityCVE-2026-112911updated 28 Oct 2026, 21:09 UTC
filelock: StrictSoftFileLock and SoftReadWriteLock adopt a protocol directory another user created first, losing mutual exclusion
Fixed in filelock 4.2.1Official source
| Severity | MediumCVSS 6.3 of 10 |
|---|---|
| Being exploited? | UnclearNo reports either way yet |
| Fix available? | Yesfilelock 4.2.1 · since 28 Oct 2026 |
| How sure is this? | Official sourceBacked by an official source |
Are you affected?
| Package / product | Affected versions | Fixed in |
|---|---|---|
| filelock · pip | >= 3.30.0, <= 4.2.0 | 4.2.1 |
Timeline
- 28 Oct 2026, 21:08 UTCPublicly disclosed
- 28 Oct 2026, 21:08 UTCReported by GitHub Advisory · GitHub Advisory
- 28 Oct 2026, 21:09 UTCPicked up by Zero Radar
Sources 1 report, oldest first
Official vendor, government CERT or advisory database
- filelock: StrictSoftFileLock and SoftReadWriteLock adopt a protocol directory another user created first, losing mutual exclusionGitHub Advisory · 28 Oct 2026, 21:08 UTC
Technical details
- ID
- CVE-2026-112911 · GHSA-9c4x-gm8v-wgc4
- CVSS
- 6.3 / 10
- EPSS
- 0.1% chance of exploitation within 30 days
- Disclosed
- 28 Oct 2026, 21:08 UTC
- On Zero Radar
- 28 Oct 2026, 21:09 UTC (1 min after disclosure)
- Last change
- 28 Oct 2026, 21:09 UTC
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