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Message-ID: <644e2e36-ff30-4dff-a77c-305980eecca8@oracle.com>
Date: Wed, 29 Jul 2026 12:08:23 -0700
From: Alan Coopersmith <alan.coopersmith@...cle.com>
To: oss-security@...ts.openwall.com
Subject: Fwd: [CVE-2026-13346] pip absolute path traversal
during download from malicious package indexes
https://www.cve.org/CVERecord?id=CVE-2026-13346 currently shows
all pip versions before 26.2 as affected by this CVE.
-------- Forwarded Message --------
Subject: [Security-announce][CVE-2026-13346] pip absolute path
traversal during download from malicious package indexes
Date: Wed, 29 Jul 2026 18:35:14 +0000
From: Seth Larson <seth@...hon.org>
Reply-To: security-sig@...hon.org
To: security-announce@...hon.org
There is a MEDIUM severity vulnerability affecting pip.
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.
Please see the linked CVE ID for the latest information on affected
versions:
* https://www.cve.org/CVERecord?id=CVE-2026-13346
* https://github.com/pypa/pip/pull/14110
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