CVE-2025-71437 Astral uv through 0.8.21 Path Traversal via Symlinks in Sdist Tar Extraction
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2025-71437?
CVE-2025-71437 is a high-severity vulnerability in astral-sh uv, published on 21 Oct 2026.
Official description
Astral uv before 0.8.22 contains a path traversal vulnerability in source distribution (sdist) tar extraction that allows a specially crafted sequence of symlinks to redirect file writes outside the intended extraction prefix. Attackers can publish a malicious sdist that, when installed by a victim, writes arbitrary files to filesystem locations outside the installation prefix.
Weakness: CWE-22
Which versions are affected by CVE-2025-71437?
How do I fix CVE-2025-71437?
No fix has been published for CVE-2025-71437 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-71437 being exploited?
There is no known exploitation of CVE-2025-71437 in the wild and no public exploit code.
Sources
Also known as GHSA-5gxr-jwgw-qf6w, GHSA-7j9j-68r2-f35q, UBUNTU-CVE-2025-71437.