CVE-2026-22701

Katalog CVE

CVSS 5.3 · Medium EPSS 0,13%

Kerentanan Improper Link Resolution Before File Access ('Link Following') pada tox-dev filelock. Skor CVSS 3.1 5.3 (Medium) menurut github.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

10 Januari 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

5.3 (Medium), sumber github.com
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-59: Improper Link Resolution Before File Access ('Link Following')
CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

EPSS (30 hari)

0,13% peluang dieksploitasi; lebih tinggi dari 2,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/tox-dev/filelock/security/advisories/GHSA-qmgc-5h2g-mvrw mitigasi · patch · advisory vendor
• https://github.com/tox-dev/filelock/commit/255ed068bc85d1ef406e50a135e1459170dd1bf0 patch
• https://github.com/tox-dev/filelock/commit/41b42dd2c72aecf7da83dbda5903b8087dddc4d5 patch