CVE-2026-53513

@better-auth/sso provider registration has server-side request forgery via unvalidated OIDC endpoints

Published 15 Jul 2026Modified 21 Jul 2026CWE 20, 345, 441, 918

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

GHSA9.6CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Trivy's own label is CRITICAL. Rated critical by GHSA.

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 packages and fixed versions

Source	Package	Fixed in
npm::GitHub Security Advisory npm	@better-auth/sso	1.6.11

References

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