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CVE-2026-53513

Estado: AnalizadaCrítica (9.6)—

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

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

SSRF remota (POST endpoints con validación origen ausente) permite redireccionar llamadas OIDC a servidores controlados (CWE-918); impacta secuestro de flujo (SSRF = T1090), manipulación de datos (falsificación de JWT) y enlace de cuentas.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementDisable or Remove Feature or ProgramVulnerability ScanningThreat Intelligence ProgramSSL/TLS InspectionRestrict File and Directory Permissions

Tecnologías afectadas (2)

Better-auth — Better-auth/ssoBetter-auth — Better Auth

CWE

Referencias

JSON original (NVD)

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  "cveTags": [],
  "metrics": {
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          "options": [
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          "privilegesRequired": "LOW",
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          "value": "CWE-345"
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  "lastModified": "2026-07-21T15:39:52.240",
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