LOW 2.0 NVD
CVE-2025-71402
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-ses
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.
References
- https://github.com/better-auth/better-auth/security/advisories/GHSA-wmjr-v86c-m9jj
- https://www.vulncheck.com/advisories/better-auth-before-session-revocation-via-forged-cook
This low severity vulnerability with a CVSS score of 2.0 was published on 2026-08-01 via NVD.
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