CVE-2026-8589

Estado: AnalizadaAlta (8.7)—

GitLab has remediated an issue in GitLab EE affecting all versions from 13.1.4 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user to add unauthorized email addresses to a targeted user's account due to improper sanitization of user-supplied input in certain group setting fields.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Puntuación base: 8.7

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.40%
Percentil entre todas las CVEs puntuadas: 32
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.

ExplotaciónT1189 Drive-by Compromiseinitial access75 %
Impacto principalT1098.002 Additional Email Delegate Permissionspersistence · privilege escalation80 %
Impacto secundarioT1556 Modify Authentication Processdefense impairment · persistence · credential access70 %

CWE-79 (XSS) en campos de configuración de grupo permite inyectar scripts; usuario autenticado agrega emails no autorizados alterando cuenta ajena (account takeover/credential access).

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 Multi-factor Authentication User Training User Account Management Restrict Web-Based Content Restrict File and Directory Permissions

Tecnologías afectadas (1)

Gitlab — Gitlab

CWE

CWE-79

Referencias

JSON original (NVD)

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