Security Advisory

CVE-2025-71402

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-01 12:22:16

Last updated 2026-08-01 12:22:16

Assigner VulnCheck

CVSS score not scored

State PUBLISHED

Description

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.

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