CVE-2025-52991: Nixos Nix

Low severity, CVSS 3.2. EPSS: 0.2% chance of exploitation in the next 30 days.

The Nix, Lix, and Guix package managers default to using temporary build directories in a world-readable and world-writable location. This allows standard users to deceive the package manager into using directories with pre-existing content, potentially leading to unauthorized actions or data manipulation. This affects Nix before 2.24.15, 2.26.4, 2.28.4, and 2.29.1; Lix before 2.91.2, 2.92.2, and 2.93.1; and Guix before 1.4.0-38.0e79d5b.

Affected products

• Nixos Nix: before 2.24.15 (fixed in 2.24.15); from 2.25.0, before 2.26.4 (fixed in 2.26.4); from 2.27.0, before 2.28.4 (fixed in 2.28.4); from 2.29.0, before 2.29.1 (fixed in 2.29.1)

Published 2025-06-27. Last modified 2026-06-17.