VULNERABILITY INTELLIGENCE

CVE-2026-13346

CVSS score6.5 MEDIUM
EPSS probability0.29%
CISA KEVNot currently listed
Published2026-07-29
Last modified2026-10-24
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Description

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.

Weakness classification

  • cna@python.org: CWE-36

Primary references