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Fencer Vulns
high 7.9

CVE-2025-53819 json

Nix's privilege dropping to build user broke for macOS

published 2025-07-14 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-21392

cvss
7.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits
0
none known

Summary

Nix is a package manager for Linux and other Unix systems. Builds with Nix 2.30.0 on macOS were executed with elevated privileges (root), instead of the build users. The fix was applied to Nix 2.30.1. No known workarounds are available.

Patch / fix

  • nixos nix 2.30.1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
15 mo ago

Exploit prediction

0.15% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.9 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L

Affected products

  • NixOS nix

Classification

Weakness
  • CWE-271 Privilege Dropping / Lowering Errors

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.