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 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.
CSIRTS triage
- What
- CVE-2026-13346 is referenced but no details are available to assess the vulnerability.
- Who is affected
- Unknown; insufficient information provided.
- Urgency
- Urgency cannot be determined without vulnerability details.
- Action
- Obtain full advisory details for CVE-2026-13346 before proceeding.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all EPSS-scored CVEs.
Advisory coverage (2)
- unknownCVE-2026-13346: CVE-2026-13346msrc · 2026-08-06
- unknownCVE-2026-13346: pip would incorrectly handle doubly-encoded package URLs from indexes allowing for files to be…nvd · 2026-07-29
External references
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[](https://www.csirts.com/cve/CVE-2026-13346)