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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);

PUBLISHED Reserved 2026-05-05 | Published 2026-05-05 | Updated 2026-05-05 | Assigner mitre




MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Problem types

CWE-36 Absolute Path Traversal

Product status

Default status
unaffected

2.24.7 (semver) before 2.28.7
affected

2.29.0 (semver) before 2.29.4
affected

2.30.0 (semver) before 2.30.5
affected

2.31.0 (semver) before 2.31.5
affected

2.32.0 (semver) before 2.32.8
affected

2.33.0 (semver) before 2.33.6
affected

2.34.0 (semver) before 2.34.7
affected

References

discourse.nixos.org/...ilege-escalation-in-lix-and-nix/77407

www.openwall.com/lists/oss-security/2026/05/04/33

github.com/NixOS/nix/security/advisories/GHSA-gr92-w2r5-qw5p

cve.org (CVE-2026-44029)

nvd.nist.gov (CVE-2026-44029)

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