CVE-2025-71402better-auth before 1.4.0 Session Revocation via Forged Cookie

Descripción

better-auth versions greater than 1.3.34 and before 1.4.0 contain a vulnerability in the multi-session plugin's /sign-out after-hook, which trusts raw multi-session cookies and forwards extracted values to internalAdapter.deleteSessions without verifying the cookie signature (e.g., via getSignedCookie). An attacker can supply a forged _multi-* cookie to trigger deletion of arbitrary session tokens.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• GitHub Security Advisory (GHSA-wmjr-v86c-m9jj) vendor-advisory
• VulnCheck Advisory: better-auth before 1.4.0 Session Revocation via Forged Cookie third-party-advisory