Your message dated Thu, 5 Feb 2026 00:26:50 +0100
with message-id <[email protected]>
and subject line python-filelock: CVE-2026-22701
has caused the Debian Bug report #1125190,
regarding python-filelock: CVE-2026-22701
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1125190: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1125190
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--- Begin Message ---
Source: python-filelock
Version: 3.20.2-1
Severity: important
Tags: security upstream
X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Hi,
The following vulnerability was published for python-filelock.
CVE-2026-22701[0]:
| filelock is a platform-independent file lock for Python. Prior to
| version 3.20.3, a TOCTOU race condition vulnerability exists in the
| SoftFileLock implementation of the filelock package. An attacker
| with local filesystem access and permission to create symlinks can
| exploit a race condition between the permission validation and file
| creation to cause lock operations to fail or behave unexpectedly.
| The vulnerability occurs in the _acquire() method between
| raise_on_not_writable_file() (permission check) and os.open() (file
| creation). During this race window, an attacker can create a symlink
| at the lock file path, potentially causing the lock to operate on an
| unintended target file or leading to denial of service. This issue
| has been patched in version 3.20.3.
If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.
For further information see:
[0] https://security-tracker.debian.org/tracker/CVE-2026-22701
https://www.cve.org/CVERecord?id=CVE-2026-22701
[1] https://github.com/tox-dev/filelock/security/advisories/GHSA-qmgc-5h2g-mvrw
[2]
https://github.com/tox-dev/filelock/commit/41b42dd2c72aecf7da83dbda5903b8087dddc4d5
Please adjust the affected versions in the BTS as needed.
Regards,
Salvatore
--- End Message ---
--- Begin Message ---
Version: python-filelock/3.20.3-1
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