CVE-2026-18693
An issue in MongoDB Server's handling of timeseries collections could allow an authenticated user with write privileges to cause an internal data structure to become inconsistent through certain document insertions. A subsequent insert into the affected bucket could then result in the server accessing memory outside its intended bounds, potentially causing a server crash (denial of service), exposure of limited memory contents, or memory corruption.
CVSS
- Versión: 4.0
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/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: 7.2
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.34%
- Percentil entre todas las CVEs puntuadas: 25
- 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.
- Explotación
T1210Exploitation of Remote Serviceslateral movement75 % - Impacto principal
T1499.004Application or System Exploitationimpact70 % - Impacto secundario
T1565.001Stored Data Manipulationimpact55 %
Vector CVSS con AV:N, PR:L indica servicios remotos con privilegios; CWE-787 (buffer overflow) en MongoDB permite DoS por corrupción de memoria o modificación de datos internos de timeseries.
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
Tecnologías afectadas (1)
CWE
- CWE-787
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-18693",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-18693",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-08-11T20:24:53.628827Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "cna@mongodb.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.6,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H",
"integrityImpact": "LOW",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "LOW"
},
"impactScore": 4.7,
"exploitabilityScore": 2.8
}
],
"cvssMetricV40": [
{
"type": "Secondary",
"source": "cna@mongodb.com",
"cvssData": {
"Safety": "NOT_DEFINED",
"version": "4.0",
"Recovery": "NOT_DEFINED",
"baseScore": 7.2,
"Automatable": "NOT_DEFINED",
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/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",
"exploitMaturity": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "LOW",
"subIntegrityImpact": "NONE",
"vulnIntegrityImpact": "LOW",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"vulnAvailabilityImpact": "HIGH",
"availabilityRequirement": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"subConfidentialityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"confidentialityRequirement": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED"
}
}
]
},
"affected": [
{
"source": "cna@mongodb.com",
"affectedData": [
{
"vendor": "MongoDB",
"product": "MongoDB Server",
"versions": [
{
"status": "affected",
"version": "8.3.0",
"lessThan": "8.3.8",
"versionType": "semver"
},
{
"status": "affected",
"version": "8.0",
"lessThan": "8.0.29",
"versionType": "semver"
},
{
"status": "affected",
"version": "7.0",
"lessThan": "7.0.40",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
}
]
}
],
"published": "2026-08-11T19:17:23.450",
"references": [
{
"url": "https://jira.mongodb.org/browse/SERVER-129994",
"tags": [
"Vendor Advisory",
"Issue Tracking"
],
"source": "cna@mongodb.com"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "cna@mongodb.com",
"description": [
{
"lang": "en",
"value": "CWE-787"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "An issue in MongoDB Server's handling of timeseries collections could allow an authenticated user with write privileges to cause an internal data structure to become inconsistent through certain document insertions. A subsequent insert into the affected bucket could then result in the server accessing memory outside its intended bounds, potentially causing a server crash (denial of service), exposure of limited memory contents, or memory corruption."
}
],
"lastModified": "2026-09-16T15:16:33.437",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F3DB18E4-812C-4E04-802D-5D6B61CE9D1B",
"versionEndExcluding": "7.0.40",
"versionStartIncluding": "7.0.0"
},
{
"criteria": "cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4DC64BC6-1D47-4809-9616-95A7CF59DC37",
"versionEndExcluding": "8.0.29",
"versionStartIncluding": "8.0.0"
},
{
"criteria": "cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7BCD6B05-9FD5-4283-A2AC-8B625425597F",
"versionEndIncluding": "8.2.12",
"versionStartIncluding": "8.2.0"
},
{
"criteria": "cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6EE4503A-F53C-432E-9DDB-F488DD989E8A",
"versionEndExcluding": "8.3.8",
"versionStartIncluding": "8.3.0"
},
{
"criteria": "cpe:2.3:a:mongodb:mongodb:9.0.0:alpha0:*:*:-:-:*:*",
"vulnerable": true,
"matchCriteriaId": "0FB52026-6C88-4401-84B5-3A070F0906D4"
},
{
"criteria": "cpe:2.3:a:mongodb:mongodb:9.0.0:alpha1:*:*:-:-:*:*",
"vulnerable": true,
"matchCriteriaId": "8D32A105-731C-493E-8CBF-639204CDAC7C"
},
{
"criteria": "cpe:2.3:a:mongodb:mongodb:9.1.0:alpha0:*:*:-:-:*:*",
"vulnerable": true,
"matchCriteriaId": "D56E512D-83F8-4D51-8690-E92F6A006822"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "cna@mongodb.com"
}