CVE-2026-84652

Estado: AnalizadaAlta (7.3)—

In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, Jenkins does not rotate the session when a user is authenticated via the "remember me" cookie, allowing attackers able to serve content on the same site as Jenkins to set a known session cookie in the victim's browser, which after the victim authenticates via the "remember me" cookie, grants the attacker access to Jenkins as that user.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Puntuación base: 7.3

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.44%
Percentil entre todas las CVEs puntuadas: 36
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.

ExplotaciónT1203 Exploitation for Client Executionexecution75 %
Impacto principalT1078.001 Default Accountsstealth · persistence · privilege escalation · initial access85 %
Impacto secundarioT1556.004 Network Device Authenticationdefense impairment · persistence · credential access60 %

Requiere interacción del usuario (UI:R) al autenticarse via cookie 'remember me'. El atacante obtiene acceso a la cuenta Jenkins (T1078.001: acceso válido obtenido via sesión secuestrada) y potencial manipulación de contraseñas/tokens (T1556.004: modificación de mecanismos de autenticación).

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

Multi-factor Authentication Privileged Account Management Password Policies Application Isolation and Sandboxing Exploit Protection Update Software

Tecnologías afectadas (1)

Jenkins — Jenkins

CWE

CWE-384

Referencias

https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-4016

JSON original (NVD)

Mostrar

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  "lastModified": "2026-09-11T21:09:18.967",
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