CVE-2026-53513

Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.11, the @better-auth/sso plugin's POST /sso/register and POST /sso/update-provider endpoints accept attacker-controlled oidcConfig.userInfoEndpoint, tokenEndpoint, and jwksEndpoint URLs when skipDiscovery: true is set, store them on the ssoProvider row without origin validation, and fetch them during OIDC callback, allowing non-blind server-side request forgery and possible account linking when trustEmailVerified: true is configured. This issue is fixed in version 1.6.11.

CVSS v3 9.6 CRITICAL

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/better-auth/better-auth/commit/37f60cb176cb53147da7dfd5ec15afa5b486e81e	Patch
https://github.com/better-auth/better-auth/pull/9574	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-5rr4-8452-hf4v	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:better-auth:better-auth\/sso::::::node.js::*
	cpe:2.3:a:better-auth:better_auth::::::node.js::*

History

No history.

Information

Published : 2026-07-15 18:16

Updated : 2026-07-21 15:39

NVD link : CVE-2026-53513

Mitre link : CVE-2026-53513

CVE.ORG link : CVE-2026-53513

JSON object : View

Products Affected

better-auth

better_auth
better-auth\/sso

CWE

CWE-20

Improper Input Validation

CWE-345

Insufficient Verification of Data Authenticity

CWE-441

Unintended Proxy or Intermediary ('Confused Deputy')

CWE-918

Server-Side Request Forgery (SSRF)

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