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CVE-2026-44029

25
FAUCET Score

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);

First published: May 5, 2026Last modified: May 5, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.24.7, < 2.28.7CPE match
cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*
>= 2.29.0, < 2.29.4CPE match
cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*
>= 2.30.0, < 2.30.5CPE match
cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*
>= 2.31.0, < 2.31.5CPE match
cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*
>= 2.32.0, < 2.32.8CPE match
cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.57%
Probability of exploitation in next 30 days
EPSS Percentile
43.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0057 is in the 28th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

discourse.nixos.org / t/security-advisory-local-privilege-escalation-in-lix-and-nix/77407
github.com / NixOS/nix/security/advisories/GHSA-gr92-w2r5-qw5p
openwall.com / lists/oss-security/2026/05/04/33