CVE-2026-13346 pip absolute path traversal during download from malicious package indexes

Medium 5.6 Published 29 Jul 2026 Updated 29 Jul 2026

Attackers can install files to arbitrary locations via malicious indexes when using pip download with --only-binary, potentially leading to code execution.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2026-13346?

CVE-2026-13346 is a medium-severity path traversal vulnerability in Python Packaging Authority pip, published on 29 Jul 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

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.

Weakness: CWE-36

Which versions are affected by CVE-2026-13346?

3 open source packages ship an affected version, including pip. It affects 1 product.

Package	Affected	Fixed in
`pip` PyPI	All versions	`26.2`
`pip` PyPI	All versions	`26.2.0`
`pip` PyPI	All versions	`26.2.0`

Linux distribution packages (10)

`python3-pip` SUSE:Linux Enterprise Module for Basesystem 15 SP7	All versions	`20.0.2-150400.26.1`
`python3-pip-wheel` SUSE:Linux Enterprise Module for Basesystem 15 SP7	All versions	`20.0.2-150400.26.1`
`python-pip` SUSE:Linux Enterprise Module for Public Cloud 15 SP4	All versions	`22.3.1-150400.17.29.1`
`python-pip` SUSE:Linux Enterprise Module for Python 3 15 SP7	All versions	`22.3.1-150400.17.29.1`
`python313-pip` SUSE:Linux Enterprise Module for Python 3 15 SP7	All versions	`24.2-150700.3.3.1`
`python-pip` SUSE:Linux Enterprise Server 16.0	All versions	`25.0.1-160000.6.1`
`python36-pip` SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5	All versions	`20.2.4-8.18.1`
`python-pip` SUSE:Linux Enterprise Server for SAP applications 16.0	All versions	`25.0.1-160000.6.1`
`python-pip` openSUSE:Leap 16.0	All versions	`25.0.1-160000.6.1`
`python-pip` openSUSE:Tumbleweed	All versions	`26.2-1.1`

Products include Pypa Pip.

How do I fix CVE-2026-13346?

Upgrade pip to a fixed version for your release line: 26.2 or 26.2.0.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2026-13346 being exploited?

There is no known exploitation of CVE-2026-13346 in the wild and no public exploit code.

Sources

Also known as AZL-94335, AZL-94353, BELL-CVE-2026-13346, CLEANSTART-2026-FW80348, CLEANSTART-2026-PH11243, CLEANSTART-2026-SL06718 and 29 more.