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        "state": "PUBLISHED",
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        "dateReserved": "2026-07-18T12:38:41.077Z",
        "datePublished": "2026-08-01T12:22:16.655Z",
        "dateUpdated": "2026-08-03T19:32:01.754Z"
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            "title": "better-auth before 1.4.0 Session Revocation via Forged Cookie",
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                    "lang": "en",
                    "value": "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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