{"id":"CVE-2026-110862","summary":"Better Auth 1.4.0-beta.18 before 1.7.7 Authentication Bypass via Magic Link","details":"Better Auth from 1.4.0-beta.18 before 1.7.7 contains an authentication bypass vulnerability that allows unauthenticated attackers to sign in as other users by reusing OAuth state values as Magic Link tokens. Attackers can start an OAuth sign-in with a victim's email and submit the returned state to Magic Link verification, gaining sessions or creating falsely email-verified accounts.","aliases":["GHSA-965c-763c-88jm"],"modified":"2026-10-15T10:47:35.213136074Z","published":"2026-10-14T22:52:46.811Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110862.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-287"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110862.json"},{"type":"ADVISORY","url":"https://github.com/better-auth/better-auth/security/advisories/GHSA-965c-763c-88jm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-110862"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/better-auth-1.4.0-beta.18-before-1.7.7-authentication-bypass-via-magic-link"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/better-auth/better-auth","events":[{"introduced":"04c0c10472ae2f287da0c352e719fa22ca49e674"},{"fixed":"db02f233918ad1233bf0753e437e1c0da353273d"}],"database_specific":{"extracted_events":[{"introduced":"1.4.0-beta.18"},{"fixed":"1.7.7"}],"source":"AFFECTED_FIELD"}}],"versions":["v1.7.6","v1.7.5","v1.7.4","v1.7.3","v1.7.2","v1.6.30","v1.7.1","v1.7.0","v1.6.29","v1.6.28","v1.6.27","v1.6.26","v1.6.25","v1.6.24","v1.6.23","v1.6.22","v1.6.21","v1.6.20","v1.6.19","v1.6.18","v1.6.17","v1.6.16","better-auth@1.6.16","auth@1.6.16","@better-auth/test-utils@1.6.16","@better-auth/telemetry@1.6.16","@better-auth/stripe@1.6.16","@better-auth/sso@1.6.16","@better-auth/scim@1.6.16","@better-auth/redis-storage@1.6.16","@better-auth/prisma-adapter@1.6.16","@better-auth/passkey@1.6.16","@better-auth/oauth-provider@1.6.16","@better-auth/mongo-adapter@1.6.16","@better-auth/memory-adapter@1.6.16","@better-auth/kysely-adapter@1.6.16","@better-auth/i18n@1.6.16","@better-auth/expo@1.6.16","@better-auth/electron@1.6.16","@better-auth/drizzle-adapter@1.6.16","@better-auth/core@1.6.16","@better-auth/api-key@1.6.16","v1.6.15","better-auth@1.6.15","auth@1.6.15","@better-auth/test-utils@1.6.15","@better-auth/telemetry@1.6.15","@better-auth/stripe@1.6.15","@better-auth/sso@1.6.15","@better-auth/scim@1.6.15","@better-auth/redis-storage@1.6.15","@better-auth/prisma-adapter@1.6.15","@better-auth/passkey@1.6.15","@better-auth/oauth-provider@1.6.15","@better-auth/mongo-adapter@1.6.15","@better-auth/memory-adapter@1.6.15","@better-auth/kysely-adapter@1.6.15","@better-auth/i18n@1.6.15","@better-auth/expo@1.6.15","@better-auth/electron@1.6.15","@better-auth/drizzle-adapter@1.6.15","@better-auth/core@1.6.15","@better-auth/api-key@1.6.15","v1.6.14","better-auth@1.6.14","auth@1.6.14","@better-auth/test-utils@1.6.14","@better-auth/telemetry@1.6.14","@better-auth/stripe@1.6.14","@better-auth/sso@1.6.14","@better-auth/scim@1.6.14","@better-auth/redis-storage@1.6.14","@better-auth/prisma-adapter@1.6.14","@better-auth/passkey@1.6.14","@better-auth/oauth-provider@1.6.14","@better-auth/mongo-adapter@1.6.14","@better-auth/memory-adapter@1.6.14","@better-auth/kysely-adapter@1.6.14","@better-auth/i18n@1.6.14","@better-auth/expo@1.6.14","@better-auth/electron@1.6.14","@better-auth/drizzle-adapter@1.6.14","@better-auth/core@1.6.14","@better-auth/api-key@1.6.14","v1.6.13","better-auth@1.6.13","auth@1.6.13","@better-auth/test-utils@1.6.13","@better-auth/telemetry@1.6.13","@better-auth/stripe@1.6.13","@better-auth/sso@1.6.13","@better-auth/scim@1.6.13","@better-auth/redis-storage@1.6.13","@better-auth/prisma-adapter@1.6.13","@better-auth/passkey@1.6.13","@better-auth/oauth-provider@1.6.13","@better-auth/mongo-adapter@1.6.13","@better-auth/memory-adapter@1.6.13","@better-auth/kysely-adapter@1.6.13","@better-auth/i18n@1.6.13","@better-auth/expo@1.6.13","@better-auth/electron@1.6.13","@better-auth/drizzle-adapter@1.6.13","@better-auth/core@1.6.13","@better-auth/api-key@1.6.13","v1.6.12","better-auth@1.6.12","auth@1.6.12","@better-auth/test-utils@1.6.12","@better-auth/telemetry@1.6.12","@better-auth/stripe@1.6.12","@better-auth/sso@1.6.12","@better-auth/scim@1.6.12","@better-auth/redis-storage@1.6.12","@better-auth/prisma-adapter@1.6.12","@better-auth/passkey@1.6.12","@better-auth/oauth-provider@1.6.12","@better-auth/mongo-adapter@1.6.12","@better-auth/memory-adapter@1.6.12","@better-auth/kysely-adapter@1.6.12","@better-auth/i18n@1.6.12","@better-auth/expo@1.6.12","@better-auth/electron@1.6.12","@better-auth/drizzle-adapter@1.6.12","@better-auth/core@1.6.12","@better-auth/api-key@1.6.12","v1.6.11","better-auth@1.6.11","auth@1.6.11","@better-auth/test-utils@1.6.11","@better-auth/telemetry@1.6.11","@better-auth/stripe@1.6.11","@better-auth/sso@1.6.11","@better-auth/scim@1.6.11","@better-auth/redis-storage@1.6.11","@better-auth/prisma-adapter@1.6.11","@better-auth/passkey@1.6.11","@better-auth/oauth-provider@1.6.11","@better-auth/mongo-adapter@1.6.11","@better-auth/memory-adapter@1.6.11","@better-auth/kysely-adapter@1.6.11","@better-auth/i18n@1.6.11","@better-auth/expo@1.6.11","@better-auth/electron@1.6.11","@better-auth/drizzle-adapter@1.6.11","@better-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