{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-114607", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-21T20:34:25.599Z", "datePublished": "2026-10-22T16:47:27.480Z", "dateUpdated": "2026-10-22T16:47:27.480Z"}, "containers": {"cna": {"title": "better-auth: OAuth state can be used as a Magic Link to sign in as another user", "problemTypes": [{"descriptions": [{"cweId": "CWE-287", "lang": "en", "description": "CWE-287: Improper Authentication", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/better-auth/better-auth/security/advisories/GHSA-965c-763c-88jm", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-965c-763c-88jm"}, {"name": "https://github.com/better-auth/better-auth/pull/11494", "tags": ["x_refsource_MISC"], "url": "https://github.com/better-auth/better-auth/pull/11494"}, {"name": "https://github.com/better-auth/better-auth/commit/ac54bfd67821a7607533af2059858b12bc54e26a", "tags": ["x_refsource_MISC"], "url": "https://github.com/better-auth/better-auth/commit/ac54bfd67821a7607533af2059858b12bc54e26a"}, {"name": "https://github.com/better-auth/better-auth/releases/tag/v1.7.7", "tags": ["x_refsource_MISC"], "url": "https://github.com/better-auth/better-auth/releases/tag/v1.7.7"}], "affected": [{"vendor": "better-auth", "product": "better-auth", "versions": [{"version": ">= 1.4.0-beta.18, < 1.7.7", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-22T16:47:27.480Z"}, "descriptions": [{"lang": "en", "value": "Better Auth is an authentication and authorization library for TypeScript. From 1.4.0-beta.18 until 1.7.7, deployments that enable Magic Link with storeToken set to plain, or with storeToken set to hashed and the global verification.storeIdentifier setting also set to hashed, enable a built-in social or Generic OAuth provider, and use account.storeStateStrategy set to database can accept an OAuth sign-in state value as a Magic Link token. These settings can cause Magic Link verification records and OAuth state to resolve to the same stored identifier, allowing an unauthenticated attacker to start OAuth sign-in for a known email address and redeem the returned state through Magic Link without controlling the mailbox or completing the provider callback. The attacker can obtain a normal session for an existing user, or create an account incorrectly marked as email verified when sign-up is enabled. This issue is fixed in version 1.7.7."}], "source": {"advisory": "GHSA-965c-763c-88jm", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "better-auth", "vendor": "better-auth", "versions": [{"status": "affected", "version": ">= 1.4.0-beta.18, < 1.7.7"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Better Auth is an authentication and authorization library for TypeScript. From 1.4.0-beta.18 until 1.7.7, deployments that enable Magic Link with storeToken set to plain, or with storeToken set to hashed and the global verification.storeIdentifier setting also set to hashed, enable a built-in social or Generic OAuth provider, and use account.storeStateStrategy set to database can accept an OAuth sign-in state value as a Magic Link token. These settings can cause Magic Link verification records and OAuth state to resolve to the same stored identifier, allowing an unauthenticated attacker to start OAuth sign-in for a known email address and redeem the returned state through Magic Link without controlling the mailbox or completing the provider callback. The attacker can obtain a normal session for an existing user, or create an account incorrectly marked as email verified when sign-up is enabled. This issue is fixed in version 1.7.7."}], "id": "CVE-2026-114607", "lastModified": "2026-10-22T17:40:46.877", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "[email protected]", "type": "Secondary"}]}, "published": "2026-10-22T17:16:58.577", "references": [{"source": "[email protected]", "url": "https://github.com/better-auth/better-auth/commit/ac54bfd67821a7607533af2059858b12bc54e26a"}, {"source": "[email protected]", "url": "https://github.com/better-auth/better-auth/pull/11494"}, {"source": "[email protected]", "url": "https://github.com/better-auth/better-auth/releases/tag/v1.7.7"}, {"source": "[email protected]", "url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-965c-763c-88jm"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "[email protected]", "type": "Primary"}]}

{}

{}