CVE-2026-18691

Estado: AnalizadaCrítica (9)—

An issue in MongoDB Server's intra-cluster connection setup could allow a party with suitable network access to influence which authentication mechanism is used when one replica set member connects to another. Under certain conditions, this could cause the cluster's shared internal credential to be transmitted in a less-protected form, potentially allowing that credential to be recovered. If recovered, the credential could be used to authenticate as the internal superuser to nodes in the deployment.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Puntuación base: 9

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.36%
Percentil entre todas las CVEs puntuadas: 27
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.

ExplotaciónT1210 Exploitation of Remote Serviceslateral movement85 %
Impacto principalT1212 Exploitation for Credential Accesscredential access80 %
Impacto secundarioT1068 Exploitation for Privilege Escalationprivilege escalation70 %
Impacto secundarioT1078 Valid Accountsstealth · persistence · privilege escalation · initial access75 %

AV:A (red adyacente) sin requisitos de privilegios, permite comprometer credenciales internas del cluster MongoDB y autenticarse como superusuario interno para escalar privilegios en nodos.

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

Threat Intelligence Program Application Isolation and Sandboxing Exploit Protection Update Software Application Developer Guidance Privileged Account Management

Tecnologías afectadas (1)

Mongodb — Mongodb

CWE

CWE-757

Referencias

https://jira.mongodb.org/browse/SERVER-130264

JSON original (NVD)

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