CVE-2026-33896

Estado: ModificadaCrítica (9.1)—

Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, `pki.verifyCertificateChain()` does not enforce RFC 5280 basicConstraints requirements when an intermediate certificate lacks both the `basicConstraints` and `keyUsage` extensions. This allows any leaf certificate (without these extensions) to act as a CA and sign other certificates, which node-forge will accept as valid. Version 1.4.0 patches the issue.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Puntuación base: 9.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.50%
Percentil entre todas las CVEs puntuadas: 41
Fecha de la puntuación: 5/10/2026

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 principalT1557 Adversary-in-the-Middlecredential access · collection75 %
Impacto secundarioT1556 Modify Authentication Processdefense impairment · persistence · credential access70 %

Vulnerabilidad de validación de certificados TLS en librería JavaScript accesible en red (AV:N, PR:N). Permite ejecutar ataques MITM (T1557) e inyectar certificados maliciosos (T1556). CWE-295 (validación incorrecta) refuerza impacto en cadena de confianza.

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 Management Network Segmentation Limit Access to Resource Over Network Filter Network Traffic Vulnerability Scanning User Training

Tecnologías afectadas (1)

Digitalbazaar — Forge

CWE

CWE-295
CWE-295

Referencias

JSON original (NVD)

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