CVE-2026-44029
Medium
Description
An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via "nix-prefetch-url --unpack" or "nix store prefetch-file --unpack" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);
SeverityMedium
CVSS5.3
Exploit probability—
ProductNix
PublishedMay 5, 2026
First seenMay 5, 2026
Weakness typeCWE-36CWE-36
How to fix
Update
- NixOS Nix2.28.7, 2.29.4, 2.30.5, 2.31.5, 2.32.8, 2.33.6, 2.34.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| NixOS Nix | 2.24.7 ≤ v < 2.28.7, 2.29.0 ≤ v < 2.29.4, 2.30.0 ≤ v < 2.30.5, 2.31.0 ≤ v < 2.31.5, 2.32.0 ≤ v < 2.32.8, 2.33.0 ≤ v < 2.33.6, 2.34.0 ≤ v < 2.34.7 | 2.28.7, 2.29.4, 2.30.5, 2.31.5, 2.32.8, 2.33.6, 2.34.7 |
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