PT-2025-32685 · Hydra · Hydra

Published 2025-08-12 · Updated 2025-08-12 · CVE-2025-54864

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: Hydra versions prior to commit f7bda02

Description: Hydra is a continuous integration service for Nix based projects. The /api/push-github and /api/push-gitea API endpoints were called by their respective forges without HTTP Basic authentication, despite featuring HMAC signing with a secret key. Triggering evaluations, particularly large ones, could lead to denial of service attacks on the host running the evaluator.

Recommendations: Update to commit f7bda02 or later. As a workaround, block access to the /api/push-github and /api/push-gitea API endpoints via a reverse proxy.

Exploit

Fix

Missing Authentication

Weakness Enumeration

CWE-306

Related Identifiers

CVE-2025-54864

GHSA-QPQ3-646C-VGX9

Affected Products

Hydra

References · 6

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/54xxx/CVE-2025-54864.json · Exploit
• https://github.com/NixOS/hydra/security/advisories/GHSA-qpq3-646c-vgx9 · Patch
• https://github.com/NixOS/hydra/commit/f7bda020c6144913f134ec616783e57817f7686f · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2025-54864 · Security Note
• https://osv.dev/vulnerability/CVE-2025-54864 · Vendor Advisory
• https://twitter.com/CVEnew/status/1955303408413384725 · Twitter Post