CVE Watch30 jun 2026

CVE-2026-11940

tarfile.extractall() with the 'data' or 'tar' filter could be bypassed by a crafted archive where a hardlink references a symlink stored a

CVSS

—

Sin CVSS

EPSS

0.6%

p45

KEV

—

Exploit Today

0-100

Publicado: 23 jun 2026 · Última mod.: 30 jun 2026 · CWE-22 · CWE-59

EPSS · 30d

0.6%EPSS · 30 días0.6%

2026-06-302026-07-17

Descripción técnica

tarfile.extractall() with the 'data' or 'tar' filter could be bypassed by a crafted archive where a hardlink references a symlink stored at a deeper name than the hardlink itself. The extraction fallback validated the symlink at it's archived location but recreated it at the hardlink's shallower path, letting a relative target the filter judged contained escape the destination directory. This allowed a malicious tar archive to create a symlink pointing outside the destination, enabling out-of-destination file reads or writes. This was an incomplete fix of CVE-2025-4330.

Referencias oficiales

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