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Vulnerabilities

CVE-2026-53513 | BDVDB-2026-348665 Detail

better-authbetter-auth

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact none. Attack vector: network.

Weaknesses#

  • 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)

References#

Exploit#

No public exploit known

History#

  1. Version 1Record published in the CVE List.