Medium [CVE-2026-13346] Arbitrary file installation via malicious package indexes
This medium-severity Red Hat Linux advisory covers CVE-2026-13346 affecting Red Hat Hardened Images, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7.
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Summary
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. A flaw was found in pip.
When processing doubly-encoded package URLs from malicious package indexes, pip incorrectly handles the file paths. A remote attacker could exploit this by convincing a user to download or install a package from such an index.
This could allow for files to be installed to arbitrary locations on the system, potentially leading to system compromise. Red Hat severity: Moderate — CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:H/A:L).
Weakness: CWE-22. Affected Red Hat products: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4.
Red Hat fixing advisory: RHSA-2026:48788.
Affected products named by the advisory: Red Hat package: python-pip.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 26 days ago·verify at source
- python-pip-main-26.2-0.1.hum1
- RHSA-2026:48788
Official advisory · high-confidence parse· fetched 26 days ago·verify at source
Mitigation
Upgrade to a fixed release: python-pip-main-26.2-0.1.hum1, RHSA-2026:48788. That is the remediation for this advisory.
The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.
Official advisory · high-confidence parse· fetched 26 days ago·verify at source
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