Vulnerability in Python Packaging Authority pip

[ Description ]Official 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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund22 Oct 2026WID-SEC-2026-4132

  IBM SPSS Modeler: Vulnerability allows file manipulation Translated from German

  Risk lowCVE-2026-13346
• CERT-FR2 Oct 2026CERTFR-2026-AVI-1249

  Multiple vulnerabilities in VMware products Translated from French

  Multiple vulnerabilities have been discovered in VMware products. They allow an attacker to cause a security problem not specified by the vendor.

  CVE-2026-75595CVE-2026-53910CVE-2026-56404+288 more CVEs

[ References ]References

• github.com/pypa/pip/pull/14110patch
• mail.python.org/archives/list/security-announce@python.org/thread/L2BNQGGVQCEV7DROOORQ7…vendor-advisory