{"id":"CVE-2026-114607","sourceIdentifier":"security-advisories@github.com","published":"2026-10-22T17:16:58.577","lastModified":"2026-10-23T15:17:26.763","vulnStatus":"Deferred","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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"better-auth","product":"better-auth","versions":[{"version":">= 1.4.0-beta.18, < 1.7.7","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":9.1,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":5.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-23T14:55:53.151034Z","id":"CVE-2026-114607","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-287"}]}],"references":[{"url":"https://github.com/better-auth/better-auth/commit/ac54bfd67821a7607533af2059858b12bc54e26a","source":"security-advisories@github.com"},{"url":"https://github.com/better-auth/better-auth/pull/11494","source":"security-advisories@github.com"},{"url":"https://github.com/better-auth/better-auth/releases/tag/v1.7.7","source":"security-advisories@github.com"},{"url":"https://github.com/better-auth/better-auth/security/advisories/GHSA-965c-763c-88jm","source":"security-advisories@github.com"}]}