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CVE-2026-8336

Estado: AnalizadaAlta (7.7)—

After invoking $_internalJsEmit, which is not intended to be directly accessible, or mapreduce command’s map function in a certain way, an authenticated user can subsequently crash mongod when the server-side JavaScript engine (through $where, $function, mapreduce reduce stage, etc.) is used also in a specific way, resulting in a post-authentication denial-of-service.

This issue impacts MongoDB Server v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

CVSS

Probabilidad de explotación (EPSS)

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.

Vulnerabilidad remota (AV:N) que requiere autenticación previa (PR:L) y manipulación específica del motor JavaScript de MongoDB (mapreduce, $where). El impacto es DoS por crash (VC:H, VI:H, VA:H con scope no afectado indica indisponibilidad del servicio), no ejecución remota directa. T1210 por acces

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 ManagementDisable or Remove Feature or ProgramVulnerability ScanningThreat Intelligence ProgramRestrict Web-Based ContentNetwork Segmentation

Tecnologías afectadas (1)

Mongodb — Mongodb

CWE

Referencias

JSON original (NVD)

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          "vulnerabilityResponseEffort": "MODERATE",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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              "versionType": "custom"
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              "status": "affected",
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  "published": "2026-05-13T04:17:42.197",
  "references": [
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      "url": "https://jira.mongodb.org/browse/SERVER-121610",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
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      "value": "After invoking $_internalJsEmit, which is not intended to be directly accessible, or mapreduce command’s map function in a certain way, an authenticated user can subsequently crash mongod when the server-side JavaScript engine (through $where, $function, mapreduce reduce stage, etc.) is used also in a specific way, resulting in a post-authentication denial-of-service.\n\nThis issue impacts MongoDB Server v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2."
    }
  ],
  "lastModified": "2026-06-17T11:03:49.133",
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