Vulnerability Description
When 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.
References
- https://github.com/pypa/pip/pull/13550
- https://mail.python.org/archives/list/[email protected]/thread/IF5A3G
- https://lists.debian.org/debian-lts-announce/2025/10/msg00028.html
FAQ
What is CVE-2025-8869?
CVE-2025-8869 is a documented vulnerability. When 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 thi...
How severe is CVE-2025-8869?
CVSS scoring is not yet available for CVE-2025-8869. Check NVD for updates.
Is there a patch for CVE-2025-8869?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.