CVE-2025-8869

NameCVE-2025-8869
DescriptionWhen extracting a tar archive pip may not check symbolic links point into the extraction directory if the tarfile module doesn't implement PEP 706. Note that upgrading pip to a "fixed" version for this vulnerability doesn't fix all known vulnerabilities that are remediated by using a Python version that implements PEP 706. Note that this is a vulnerability in pip's fallback implementation of tar extraction for Python versions that don't implement PEP 706 and therefore are not secure to all vulnerabilities in the Python 'tarfile' module. If you're using a Python version that implements PEP 706 then pip doesn't use the "vulnerable" fallback code. Mitigations include upgrading to a version of pip that includes the fix, upgrading to a Python version that implements PEP 706 (Python >=3.9.17, >=3.10.12, >=3.11.4, or >=3.12), applying the linked patch, or inspecting source distributions (sdists) before installation as is already a best-practice.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-4348-1
Debian Bugs1116336

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
python-pip (PTS)bullseye20.3.4-4+deb11u1vulnerable
bullseye (security)20.3.4-4+deb11u2fixed
bookworm23.0.1+dfsg-1vulnerable
trixie25.1.1+dfsg-1vulnerable
forky25.2+dfsg-1vulnerable
sid25.3+dfsg-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
python-pipsourcebullseye20.3.4-4+deb11u2DLA-4348-1
python-pipsource(unstable)25.3+dfsg-11116336

Notes

[trixie] - python-pip <no-dsa> (Minor issue)
[bookworm] - python-pip <no-dsa> (Minor issue)
https://github.com/pypa/pip/pull/13550
Merge commit: https://github.com/pypa/pip/commit/f2b92314da012b9fffa36b3f3e67748a37ef464a (25.3)
https://mail.python.org/archives/list/security-announce@python.org/thread/IF5A3GCJY3VH7BVHJKOWOJFKTW7VFQEN/

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