CVE-2025-71402
CVE-2025-71402 · better-auth before 1.4.0 Session Revocation via Forged Cookie
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 2.0 · Low · EPSS 0.3% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
better-auth
- Versions
- ≥ 0, < 1.4.0: Affected (semver)
- 1.4.0: Not affected (semver)
Update to 1.4.0
better-auth npm
- Affected ranges
- SEMVER: ≥ 1.3.34, < 1.4.0
Update to 1.4.0