PT-2026-65874 · Python Packaging Authority · Pip

CVE-2026-13346 · Published 2026-07-29 · Updated 2026-07-29

NVD

CVSS v4.0

5.6

Medium

Base vector

AV:N/AC:H/AT:P/PR:H/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

pip would incorrectly handle doubly-encoded package URLs from indexes allowing for files to be installed to arbitrary locations on disk even when installing wheels.

This vulnerability requires downloading or installing a package from a malicious package index to succeed, malicious packages alone are not able to exploit this vulnerability. Note that this vulnerability only materially impacts users running pip download with the --only-binary option as installing source distributions from an untrusted index is already an unsafe operation that executes code during install time.

Fix

Weakness Enumeration

CWE-36

Related Identifiers

CVE-2026-13346

Affected Products

Pip

References · 4

• https://github.com/pypa/pip/pull/14110 · Patch
• https://mail.python.org/archives/list/[e-mail]/thread/L2BNQGGVQCEV7DROOORQ7WFKKFF2OOQX · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-13346 · Security Note
• http://openwall.com/lists/oss-security/2026/07/29/7 · Note