CVE-2025-54864
7.5 · HIGHOverview
CVE-2025-54864 is a high-severity vulnerability affecting nixos hydra. It was published on August 12, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
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 signing with a secret key. Triggering an evaluation can be very taxing on the infrastructure when large evaluations are done, introducing potential denial of service attacks on the host running the evaluator. This issue has been patched by commit f7bda02. A workaround involves blocking /api/push-github and /api/push-gitea via a reverse proxy.
Remediation
Check the references section for vendor advisories and patches from nixos. Update hydra to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| nixos | hydra | >= 0, < 2025-08-12 | Affected |
Frequently Asked Questions
What is CVE-2025-54864?
CVE-2025-54864 is a high-severity vulnerability affecting nixos hydra. It was published on August 12, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2025-54864?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-54864?
Check the references section for vendor advisories and patches from nixos. Update hydra to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-54864?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-54864 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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