CVE-2026-11940
Gravedad CVSS v4.0:
ALTA
Tipo:
CWE-22
Limitación incorrecta de nombre de ruta a un directorio restringido (Path Traversal)
Fecha de publicación:
23/06/2026
Última modificación:
23/07/2026
Descripción
*** Pendiente de traducción *** tarfile.extractall() with the &#39;data&#39; or &#39;tar&#39;<br />
filter could be bypassed by a crafted archive where a hardlink <br />
references a symlink stored at a deeper name than the hardlink itself. <br />
The extraction fallback validated the symlink at it&#39;s archived location <br />
but recreated it at the hardlink&#39;s shallower<br />
path, letting a relative<br />
target the filter judged contained escape the destination directory. <br />
This allowed a malicious tar archive to create a symlink pointing <br />
outside the destination, enabling out-of-destination file reads or <br />
writes. This was an incomplete fix of CVE-2025-4330.
Impacto
Puntuación base 4.0
7.80
Gravedad 4.0
ALTA
Referencias a soluciones, herramientas e información
- https://github.com/python/cpython/commit/27dd970bf6b17ebca7c8ed486a40ab043ed7af8f
- https://github.com/python/cpython/commit/672825e2f36a57e173959b0d9d409d4560dab8df
- https://github.com/python/cpython/commit/771d12dda5140313db0ac550292987975651bbde
- https://github.com/python/cpython/commit/79c06bd5c6afa3c440d50faf7ee1b147c8832b4c
- https://github.com/python/cpython/commit/be13e86f6b9788a6f4d0419dffef72cbae5865c9
- https://github.com/python/cpython/issues/151558
- https://github.com/python/cpython/pull/151559
- https://mail.python.org/archives/list/security-announce@python.org/thread/LD6QIISNQFQYOIEPJNEUIPV7S3V76FZH/