CVE-2025-32435: Nixos Hydra

Low severity, CVSS 2.6. EPSS: 0.3% chance of exploitation in the next 30 days.

Hydra is a Continuous Integration service for Nix based projects. Evaluation of untrusted non-flake nix code could potentially access secrets that are accessible by the hydra user/group. This should not affect the signing keys, that are owned by the hydra-queue-runner and hydra-www users respectively.

Affected products

• Nixos Hydra: before 2025-04-11 (fixed in 2025-04-11)

Published 2025-04-15. Last modified 2026-06-17.