CVE-2026-13346

pip absolute path traversal during download from malicious package indexes

Published: Jul 29, 2026Updated: Aug 20, 2026 Sources: CVE List NVDCWE-36

6.5MEDIUM

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:RUser Interaction

Required

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:HIntegrity

High

A:NAvailability

None

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Weaknesses

CWE-36

Affected Products

Python Packaging Authority

oss-projectaka pip

pipLibrary

OSS Libraries / pypi

pypa

oss-projectaka pypa/setuptools, pipenv, pip

pipLibrary

OSS Libraries / pypi

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Discovery

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References

https://github.com/pypa/pip/pull/14110

github.com

https://mail.python.org/archives/list/security-announce@python.org/thread/L2BNQGGVQCEV7DROOORQ7WFKKFF2OOQX/

mail.python.org

http://www.openwall.com/lists/oss-security/2026/07/29/7

openwall.com

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