CVEvulnerability
CVE-2026-53513
9.6 CRITICAL
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-15
- Last modified
- 2026-07-21
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.6 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
- Weaknesses
- CWE-20, CWE-345, CWE-441, CWE-918
Description
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.
Affected configurations
• better-auth better-auth\/sso (< 1.6.11)
• better-auth better auth (>= 0.1.0 < 1.6.11)
Related
References
- 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