{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-8336", "assignerOrgId": "a39b4221-9bd0-4244-95fc-f3e2e07f1deb", "state": "PUBLISHED", "assignerShortName": "mongodb", "dateReserved": "2026-05-11T15:37:59.492Z", "datePublished": "2026-05-13T00:16:16.568Z", "dateUpdated": "2026-05-13T00:16:16.568Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "a39b4221-9bd0-4244-95fc-f3e2e07f1deb", "shortName": "mongodb", "dateUpdated": "2026-05-13T00:16:16.568Z"}, "title": "Post-authentication use-after-free error in $_internalJsEmit and mapreduce commands", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-416", "description": "CWE-416: Use After Free", "type": "CWE"}]}], "affected": [{"vendor": "MongoDB, Inc.", "product": "MongoDB Server", "versions": [{"status": "affected", "version": "7.0", "lessThan": "7.0.34", "versionType": "custom"}, {"status": "affected", "version": "8.0", "lessThan": "8.0.23", "versionType": "custom"}, {"status": "affected", "version": "8.2", "lessThan": "8.2.9", "versionType": "custom"}, {"status": "affected", "version": "8.3", "lessThan": "8.3.2", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "After invoking $_internalJsEmit, which is not intended to be directly accessible, or mapreduce command\u2019s 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 v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "After invoking $_internalJsEmit, which is not intended to be directly accessible, or mapreduce command\u2019s 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.<br><br>This issue impacts MongoDB Server v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.<br><br><br><br>"}]}], "references": [{"url": "https://jira.mongodb.org/browse/SERVER-121610", "tags": ["issue-tracking"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NO", "Recovery": "AUTOMATIC", "valueDensity": "DIFFUSE", "vulnerabilityResponseEffort": "MODERATE", "providerUrgency": "RED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.7, "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/AU:N/R:A/V:D/RE:M/U:Red"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}}], "source": {"discovery": "INTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}}}

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{"created": "2026-05-13T01:45:16.202091+00:00", "updated": "2026-05-13T01:45:16.202116+00:00", "vendors": []}