8.3

CVE-2026-53516

Better Auth: Account takeover via OAuth auto-link to unverified pre-registered email

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Better-auth ≫ Better Auth SwPlatformnode.js Version < 1.6.11
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.15% 0.048
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 8.3 2.8 5.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
CWE-287 Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

CWE-345 Insufficient Verification of Data Authenticity

The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

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
Vendor Advisory
Mitigation
https://github.com/better-auth/better-auth/pull/9578
Patch
Issue Tracking
https://github.com/better-auth/better-auth/commit/da7e50beee849c59a2ed1ec6b3a38cc6ab9fb563
Patch