CVE-2026-104056

Estado: Pendiente de análisisCrítica (9.8)—

Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 9.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.17%
Percentil entre todas las CVEs puntuadas: 5
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access85 %
Impacto principalT1195.002 Compromise Software Supply Chaininitial access80 %
Impacto secundarioT1556 Modify Authentication Processdefense impairment · persistence · credential access75 %

AV:N sin PR/UI indica exposición web directa (T1190). El caché no validado de metadatos de descubrimiento permite envenenar respuestas y redirigir endpoints, afectando la cadena de suministro OAuth/OIDC (T1195.002) y potencialmente secuestrar credenciales (T1556).

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

Vulnerability Scanning Privileged Account Management Update Software User Account Management Restrict File and Directory Permissions Restrict Registry Permissions

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Authlib — Authlib^AI

CWE

CWE-345, CWE-346, CWE-829

Referencias

JSON original (NVD)

Mostrar

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          "role": "CISA Coordinator",
          "options": [
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            {
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          "version": "2.0.3",
          "timestamp": "2026-10-05T18:21:10.671606Z"
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  "published": "2026-10-01T19:17:19.033",
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  "lastModified": "2026-10-05T19:17:14.327",
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