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CVE-2025-54864— Hydra missing authentication when triggering evaluations through GitHub and Gitea plugins

Quick assessment

Affected
NixOS hydra
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hydra是Nix开源的一个基于Nix项目的持续集成服务。 Hydra f7bda02之前版本存在访问控制错误漏洞,该漏洞源于/api/push-github和/api/push-gitea缺少HTTP基本身份验证,可能导致拒绝服务攻击。

AI Predicted 7.5 Difficulty: Easy EPSS 0.38% · P30
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I. Basic Information for CVE-2025-54864

Vulnerability Information

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Vulnerability Title
Hydra missing authentication when triggering evaluations through GitHub and Gitea plugins
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Hydra 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hydra是Nix开源的一个基于Nix项目的持续集成服务。 Hydra f7bda02之前版本存在访问控制错误漏洞,该漏洞源于/api/push-github和/api/push-gitea缺少HTTP基本身份验证,可能导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
NixOS hydra < f7bda020c6144913f134ec616783e57817f7686f -

II. Public POCs for CVE-2025-54864

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III. Intelligence Information for CVE-2025-54864

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Vendor Advisories for CVE-2025-54864 (1)

IV. Related Vulnerabilities

V. Comments for CVE-2025-54864

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