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Vulnerabilities

Security fix · CVE-2025-54800

Hydra is a continuous integration service for Nix based projects.

Published Aug 12, 2025 · catalog updated Aug 12, 2025 · NixOS

Check this week

CVE-2025-54800 is not in CISA KEV. FIRST estimates a 20.00% chance of exploitation in the next 30 days. Check whether you run NixOS.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
20.00%
Remediation
Version ranges on file
Affected products
vendor NixOS hydra < dea1e168f590efb27db32dbacc82b09e15f8ae4b

Hydra is a continuous integration service for Nix based projects. Prior to commit dea1e16, a malicious package can introduce arbitrary JavaScript code into the Hydra database that is automatically evaluated in a client's browser when anyone visits the build page. This could be done by a third-party project as part of its build process. This also happens in other places like with hydra-release-name. This issue has been patched by commit dea1e16. A workaround involves either not building untrusted packages or not visiting the builds page.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor NixOS hydra < dea1e168f590efb27db32dbacc82b09e15f8ae4b< dea1e168f590efb27db32dbacc82b09e15f8ae4b

How to fix CVE-2025-54800

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-54800 is not in CISA KEV. FIRST estimates a 20.00% chance of exploitation in the next 30 days. Check whether you run NixOS.

Which versions are affected?

Compare what you have installed with NixOS hydra < dea1e168f590efb27db32dbacc82b09e15f8ae4b < dea1e168f590efb27db32dbacc82b09e15f8ae4b. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 20.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 12, 2025 · EUVD

    Detected

    Hydra is a continuous integration service for Nix based projects. Prior to commit dea1e16, a malicious package can introduce arbitrary JavaScript code into the Hydra database that is automatically evaluated in a client's browser when anyone visits the build page. This could be done by a third-party project as part of its build process. This also happens in other places like with hydra-release-name

  2. Aug 12, 2025 · EUVD

    Updated

    Hydra is a continuous integration service for Nix based projects. Prior to commit dea1e16, a malicious package can introduce arbitrary JavaScript code into the Hydra database that is automatically evaluated in a client's browser when anyone visits the build page. This could be done by a third-party project as part of its build process. This also happens in other places like with hydra-release-name

Sources

  • CVE.orgVulnerability recordCVE-2025-54800

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2025-24268

    Hydra is a continuous integration service for Nix based projects. Prior to commit dea1e16, a malicious package can introduce arbitrary JavaScript code into the Hydra database that is automatically evaluated in a client's browser when anyone visits the build page. This could be do

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Aug 12, 2025. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.