PT-2026-46262 · Python · Cpython

Petr Viktorin + 2 · Published 2026-06-04 · Updated 2026-06-04 · CVE-2026-7774

NVD

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

tarfile.data filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() to write files outside the destination directory, subject to the permissions of the extracting process.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-7774

Affected Products

Cpython

References · 4

• https://mail.python.org/archives/list/[e-mail]/thread/4FU62L2M6RMMHT2QPGQNPEHHUND7CEX5 · Vendor Advisory
• https://github.com/python/cpython/pull/149487 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-7774 · Security Note
• https://github.com/python/cpython/issues/149486 · Note