CVE-2025-51606

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

hippo4j 1.0.0 to 1.5.0, uses a hard-coded secret key in its JWT (JSON Web Token) creation. This allows attackers with access to the source code or compiled binary to forge valid access tokens and impersonate any user, including privileged ones such as "admin". The vulnerability poses a critical security risk in systems where authentication and authorization rely on the integrity of JWTs.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-798

Affected software

No affected versions have been published.

Timeline

Published: Aug 21, 2025
Last modified: Jun 17, 2026
NVD status: Deferred

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