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.
Advisories
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-g38m-r43w-p2q7 | Better Auth has an account takeover issue via OAuth auto-link to unverified pre-registered email |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Wed, 15 Jul 2026 22:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Better-auth
Better-auth better Auth |
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| Vendors & Products |
Better-auth
Better-auth better Auth |
Wed, 15 Jul 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Wed, 15 Jul 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Better Auth: Account takeover via OAuth auto-link to unverified pre-registered email | |
| Weaknesses | CWE-287 CWE-345 |
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| References |
| |
| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-15T17:52:35.572Z
Reserved: 2026-06-09T17:30:33.456Z
Link: CVE-2026-53516
Updated: 2026-07-15T17:52:31.423Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-07-15T22:15:15Z
Github GHSA