What is CVE-2025-54864?

CVE-2025-54864 is a high-severity vulnerability in Nixos Hydra, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2025-08-12.

How severe is CVE-2025-54864?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2025-54864 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Nixos Hydra

CVE-2025-54864

Hydra is a continuous integration service for Nix based projects. Prior to commit f7bda02, /api/push-github and /api/push-gitea are called by the corresponding forge without HTTP Basic authentication. Both forges do however feature HMAC si…

Vulnerability class: Broken Authentication

EPSS: 0.004 (27.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Nixos Hydra — versions < f7bda020c6144913f134ec616783e57817f7686f

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2025-54864?: CVE-2025-54864 is a high-severity vulnerability in Nixos Hydra, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2025-08-12.
How severe is CVE-2025-54864?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2025-54864 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.