CVE-2026-53513
critical · 9.6Better 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.
9.6
CVSS
0.2%
EPSS (exploit prob.)
16th
EPSS percentile
2026-07-15
Published
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Weaknesses
CWE-20CWE-345CWE-441CWE-918
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| better-auth | better-auth/sso | < 1.6.11 |
| better-auth | better_auth | >= 0.1.0, < 1.6.11 |
Check a specific version with /api/v1/cve/match.
References
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2026-53513