CVE-2026-13346
pip absolute path traversal during download from malicious package indexes
- State
- Published
- Severity
- 5.6 Medium
- Published
- Jul 29, 2026
- Updated
- Jul 29, 2026
- Reserved
- Jun 25, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.6 Medium | CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N | PSF |
Weaknesses
- CWE-36 Absolute path traversal
Affected Products
| Product | Versions |
|---|---|
pipPython Packaging Authority |
|
References
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