CVE-2026-8336
Full vulnerability record from the local CVENow database.
Description
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.
Severity
HIGH
CVSS score
7.7
(v4.0)
Vulnerability status
Analyzed
Source identifier
Published
2026-05-13 04:17:42.197000
Last modified
2026-10-26 18:10:00.173000
View original CVE JSON
{
"id": "CVE-2026-8336",
"sourceIdentifier": "[email protected]",
"published": "2026-05-13T04:17:42.197",
"lastModified": "2026-10-26T18:10:00.173",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"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."
},
{
"lang": "es",
"value": "Después de invocar $_internalJsEmit, que no está destinado a ser directamente accesible, o la función map del comando mapreduce de cierta manera, un usuario autenticado puede posteriormente colapsar mongod cuando el motor JavaScript del lado del servidor (a través de $where, $function, la etapa reduce de mapreduce, etc.) se utiliza también de una manera específica, lo que resulta en una denegación de servicio post-autenticación.\n\nEste problema afecta a las versiones v8.2 de MongoDB Server anteriores a la 8.2.9 y a las versiones v8.3 anteriores a la 8.3.2."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "MongoDB, Inc.",
"product": "MongoDB Server",
"defaultStatus": "unaffected",
"versions": [
{
"version": "8.2",
"lessThan": "8.2.9",
"versionType": "custom",
"status": "affected"
},
{
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"lessThan": "8.3.2",
"versionType": "custom",
"status": "affected"
}
]
}
]
}
],
"metrics": {
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{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "4.0",
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/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:N/R:A/V:D/RE:M/U:Red",
"baseScore": 7.7,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnAvailabilityImpact": "HIGH",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"exploitMaturity": "NOT_DEFINED",
"confidentialityRequirement": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"availabilityRequirement": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NO",
"Recovery": "AUTOMATIC",
"valueDensity": "DIFFUSE",
"vulnerabilityResponseEffort": "MODERATE",
"providerUrgency": "RED"
}
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"availabilityImpact": "HIGH"
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{
"source": "[email protected]",
"type": "Primary",
"cvssData": {
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"integrityImpact": "NONE",
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}
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"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-05-13T14:35:06.130633Z",
"id": "CVE-2026-8336",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
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{
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"role": "CISA Coordinator",
"version": "2.0.3"
}
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},
"weaknesses": [
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"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-416"
}
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"configurations": [
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"nodes": [
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"cpeMatch": [
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"references": [
{
"url": "https://jira.mongodb.org/browse/SERVER-121610",
"source": "[email protected]",
"tags": [
"Issue Tracking",
"Vendor Advisory"
]
}
]
}