[dependabot]

Bumps filelock from 3.19.1 to 3.20.3.

Release notes

Sourced from filelock's releases.

3.20.3

What's Changed

• Fix TOCTOU symlink vulnerability in SoftFileLock by @​gaborbernat in tox-dev/filelock#465

Full Changelog: tox-dev/filelock@3.20.2...3.20.3

3.20.2

What's Changed

• Support Unix systems without O_NOFOLLOW by @​mwilliamson in tox-dev/filelock#463
• [pre-commit.ci] pre-commit autoupdate by @​pre-commit-ci[bot] in tox-dev/filelock#464

New Contributors

• @​mwilliamson made their first contribution in tox-dev/filelock#463

Full Changelog: tox-dev/filelock@3.20.1...3.20.2

3.20.1

What's Changed

• CVE-2025-68146: Fix TOCTOU symlink vulnerability in lock file creation by @​gaborbernat in tox-dev/filelock#461

Full Changelog: tox-dev/filelock@3.20.0...3.20.1

3.20.0

What's Changed

• Add tox.toml to sdist by @​mtelka in tox-dev/filelock#436
• Update docs with example by @​znichollscr in tox-dev/filelock#438
• Add 3.14 support and drop 3.9 by @​gaborbernat in tox-dev/filelock#448

New Contributors

• @​mtelka made their first contribution in tox-dev/filelock#436
• @​znichollscr made their first contribution in tox-dev/filelock#438

Full Changelog: tox-dev/filelock@3.19.1...3.20.0

Changelog

Sourced from filelock's changelog.

########### Changelog ###########

.. towncrier-draft-entries:: Unreleased

.. towncrier release notes start

---

4.0.12 (2026-10-05)

---

• Fix read-lock acquisition on SQLite versions older than 3.33.0 by using sqlite_master for the schema probe. :pr:769

---

4.0.11 (2026-10-05)

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• ReadWriteLock and AsyncReadWriteLock use a validated private hard link when /dev/fd has no entry for the database descriptor, supporting NetBSD's static descriptor directory beyond descriptor 63. The temporary location must share a filesystem with the database. The symlink refusal test accepts NetBSD's error wording.

---

4.0.10 (2026-10-03)

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• Reusing a singleton AsyncFileLock with another loop, executor or run_in_executor, or a singleton SoftFileLease with another lease_duration, heartbeat_interval or on_compromise, now raises ValueError instead of returning the lock with its original options. :pr:765

---

4.0.9 (2026-10-01)

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• ReadWriteLock and AsyncReadWriteLock close the descriptor that checks the database path once SQLite has connected, so on PyPy a dropped lock leaves no descriptor open until garbage collection runs. :pr:763
• ReadWriteLock and AsyncReadWriteLock refuse a symlink at the database path instead of following it, so a user who can create names in a shared lock directory cannot point the lock at another file (GHSA-j8f7-rjxc-mr56).

---

4.0.8 (2026-10-01)

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• ReadWriteLock.release() and SoftReadWriteLock.release() from a thread that does not hold the write lock now raise RuntimeError instead of dropping the holder's lock and letting a second writer in. :pr:761

---

4.0.7 (2026-09-29)

---

... (truncated)

Commits

• 41b42dd Fix TOCTOU symlink vulnerability in SoftFileLock (#465)
• f2e7d40 [pre-commit.ci] pre-commit autoupdate (#464)
• 5088854 Support Unix systems without O_NOFOLLOW (#463)
• 377f622 [pre-commit.ci] pre-commit autoupdate (#460)
• 4724d7f Fix TOCTOU symlink vulnerability in lock file creation (#461)
• cb69414 Bump actions/upload-artifact from 5 to 6 (#459)
• 0769294 Bump actions/download-artifact from 6 to 7 (#458)
• 414193a [pre-commit.ci] pre-commit autoupdate (#457)
• 1456797 [pre-commit.ci] pre-commit autoupdate (#456)
• 8d6bf90 Bump actions/checkout from 5 to 6 (#455)
• Additional commits viewable in compare view