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        "state": "PUBLISHED",
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        "dateReserved": "2026-10-14T22:18:33.239Z",
        "datePublished": "2026-10-14T22:52:50.378Z",
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            "title": "Better Auth @better-auth/sso before 1.7.3 Authentication Bypass via Personal SSO Providers",
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                    "value": "Better Auth @better-auth/sso from 1.7.0-rc.2 before 1.7.3 contains an authentication bypass vulnerability that allows authenticated users to sign in as other users by registering a personal SSO provider. Attackers can copy a legitimate provider's OIDC issuer or SAML entity ID and assert a victim's subject or NameID, because account lookup ignores providerId, creating sessions for victim accounts."
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