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CVE-2026-112912

nvd nist
Published: Oct 20, 2026Modified: Oct 21, 2026

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2.5
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Exploitability: 1.0 / Impact: 1.4
Source: security-advisories@github.com (Secondary)

Description

filelock is a platform-independent file lock for Python. From 3.32.6 until 4.2.1, SoftFileLock can follow a swapped symbolic link during the conditional os.access writability check for a node without its owner-write bit, allowing another local user on a platform and directory configuration that follows the link to infer whether a chosen path exists and is writable from the observable acquisition result. This issue is fixed in version 4.2.1.

Affected (1)

Products: Tox Dev: Filelock
Tox Dev
1 product
Filelock
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Filelock
3.32.6 ≤ version < 4.2.1

Related CWEs

CWE-59
Improper Link Resolution Before File Access ('Link Following')
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

References (5)

Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
Release Notes
Source: security-advisories@github.com
ExploitMitigationPatchVendor Advisory
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
ExploitMitigationPatchVendor Advisory

Timeline

No history available yet.