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Advisories

better-auth before 1.4.0 Session Revocation via Forged Cookie

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severity
low
date
Affecting

  • better-auth >= 0, < 1.4.0

CWE
  • CWE-347 Improper Verification of Cryptographic Signature
CVSS
2.0
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N
Credit
mufeedvh
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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