medium6.5
CVE-2026-13346
pip would incorrectly handle doubly-encoded package URLs from indexes allowing for files to be installed to arbitrary locations on disk even when installing wh…
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | pip | < 26.2.0 | 26.2.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Pypa | Pip | before 26.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-qwm4-qh6w-59xr
- https://nvd.nist.gov/vuln/detail/CVE-2026-13346
- https://github.com/pypa/pip/pull/14110
- https://mail.python.org/archives/list/security-announce@python.org/thread/L2BNQGGVQCEV7DROOORQ7WFKKFF2OOQX
- http://www.openwall.com/lists/oss-security/2026/07/29/7
- https://github.com/pypa/pip/commit/10dfb6b9005484578b386f64b9f36982e3dc6679
- https://github.com/pypa/advisory-database/tree/main/vulns/pip/PYSEC-2026-3721.yaml
- https://mail.python.org/archives/list/security-announce@python.org/thread/L2BNQGGVQCEV7DROOORQ7WFKKFF2OOQX/