CVE-2025-71437

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductAstral-sh Uv

PublishedOct 21, 2026

First seenOct 21, 2026

Weakness typeCWE-22Path traversal

How to fix

Vendor advisories

github.com/astral-sh/uv/security/advisories/GHSA-7j9j-68r2-f35q

Affected products

Product	Affected versions	Fixed in
astral-sh uv	v ≤ 0.8.21	—

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