CVEvulnerability
CVE-2026-53516
8.3 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-15
- Last modified
- 2026-07-21
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 8.3 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
- Weaknesses
- CWE-287, CWE-345
Description
Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.11, Better Auth's OAuth callback auto-link gate in handleOAuthUserInfo accepts implicit account linking when the OAuth provider asserts email_verified: true without requiring the local user row's emailVerified field to also be true, allowing an attacker who pre-registers a victim email through /sign-up/email to bind the victim's OAuth identity to the attacker's account. The same primitive affects one-tap, and emailAndPassword.requireEmailVerification: true does not mitigate the link-time verification change. This issue is fixed in version 1.6.11.
Affected configurations
• better-auth better auth (< 1.6.11)
Related
References
- https://github.com/better-auth/better-auth/commit/da7e50beee849c59a2ed1ec6b3a38cc6ab9fb563 Patch
- https://github.com/better-auth/better-auth/pull/9578 Issue Tracking, Patch
- https://github.com/better-auth/better-auth/releases/tag/v1.6.11 Release Notes
- https://github.com/better-auth/better-auth/security/advisories/GHSA-g38m-r43w-p2q7 Mitigation, Vendor Advisory