{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93393", "assignerOrgId": "a39b4221-9bd0-4244-95fc-f3e2e07f1deb", "state": "PUBLISHED", "assignerShortName": "mongodb", "dateReserved": "2026-09-17T20:10:59.785Z", "datePublished": "2026-09-17T20:26:38.911Z", "dateUpdated": "2026-09-18T17:35:11.797Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "a39b4221-9bd0-4244-95fc-f3e2e07f1deb", "shortName": "mongodb", "dateUpdated": "2026-09-18T17:35:11.797Z"}, "title": "Heap overflow via oversized decrypted TLS record sequence in Windows Secure Channel stream", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-787", "description": "CWE-787: Out-of-bounds Write", "type": "CWE"}]}], "affected": [{"vendor": "MongoDB Inc.", "product": "C Driver", "platforms": ["Windows"], "versions": [{"status": "affected", "version": "2.4.0", "versionType": "semver"}, {"status": "affected", "version": "2.3.0", "lessThanOrEqual": "2.3.3", "versionType": "semver"}, {"status": "affected", "version": "2.2.0", "lessThanOrEqual": "2.2.4", "versionType": "semver"}, {"status": "affected", "version": "2.1.0", "lessThanOrEqual": "2.1.2", "versionType": "semver"}, {"status": "affected", "version": "2.0.0", "lessThanOrEqual": "2.0.2", "versionType": "semver"}, {"status": "affected", "version": "1.30.0", "lessThanOrEqual": "1.30.8", "versionType": "semver"}, {"status": "affected", "version": "1.29.0", "lessThanOrEqual": "1.29.2", "versionType": "semver"}, {"status": "affected", "version": "1.28.0", "lessThanOrEqual": "1.28.1", "versionType": "semver"}, {"status": "affected", "version": "1.27.0", "lessThanOrEqual": "1.27.6", "versionType": "semver"}, {"status": "affected", "version": "1.26.0", "lessThanOrEqual": "1.26.2", "versionType": "semver"}, {"status": "affected", "version": "1.25.0", "lessThanOrEqual": "1.25.4", "versionType": "semver"}, {"status": "affected", "version": "1.24.0", "lessThanOrEqual": "1.24.4", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "A heap-based buffer overflow exists in the TLS transport layer of the MongoDB C Driver when built with the Windows platform TLS backend. A remote endpoint that the client connects to can cause the driver to write uncontrolled data outside the bounds of a heap allocation while processing incoming encrypted traffic after the TLS handshake completes. No authentication or user interaction is required, because the affected processing occurs before any application-level authentication completes. Triggering this issue may lead to memory corruption in the client process, disclosure of adjacent heap memory, or termination of the process.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "A heap-based buffer overflow exists in the TLS transport layer of the MongoDB C Driver when built with the Windows platform TLS backend. A remote endpoint that the client connects to can cause the driver to write uncontrolled data outside the bounds of a heap allocation while processing incoming encrypted traffic after the TLS handshake completes. No authentication or user interaction is required, because the affected processing occurs before any application-level authentication completes. Triggering this issue may lead to memory corruption in the client process, disclosure of adjacent heap memory, or termination of the process."}]}], "references": [{"url": "https://jira.mongodb.org/browse/CDRIVER-6417"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "CRITICAL", "baseScore": 9.2, "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 8.1, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}}], "source": {"discovery": "INTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-18T17:33:19.062224Z", "id": "CVE-2026-93393", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-18T17:33:33.750Z"}}]}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "platforms": ["Windows"], "product": "C Driver", "vendor": "MongoDB Inc.", "versions": [{"status": "affected", "version": "2.4.0", "versionType": "semver"}, {"lessThanOrEqual": "2.3.3", "status": "affected", "version": "2.3.0", "versionType": "semver"}, {"lessThanOrEqual": "2.2.4", "status": "affected", "version": "2.2.0", "versionType": "semver"}, {"lessThanOrEqual": "2.1.2", "status": "affected", "version": "2.1.0", "versionType": "semver"}, {"lessThanOrEqual": "2.0.2", "status": "affected", "version": "2.0.0", "versionType": "semver"}, {"lessThanOrEqual": "1.30.8", "status": "affected", "version": "1.30.0", "versionType": "semver"}, {"lessThanOrEqual": "1.29.2", "status": "affected", "version": "1.29.0", "versionType": "semver"}, {"lessThanOrEqual": "1.28.1", "status": "affected", "version": "1.28.0", "versionType": "semver"}, {"lessThanOrEqual": "1.27.6", "status": "affected", "version": "1.27.0", "versionType": "semver"}, {"lessThanOrEqual": "1.26.2", "status": "affected", "version": "1.26.0", "versionType": "semver"}, {"lessThanOrEqual": "1.25.4", "status": "affected", "version": "1.25.0", "versionType": "semver"}, {"lessThanOrEqual": "1.24.4", "status": "affected", "version": "1.24.0", "versionType": "semver"}]}], "source": "cna@mongodb.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A heap-based buffer overflow exists in the TLS transport layer of the MongoDB C Driver when built with the Windows platform TLS backend. A remote endpoint that the client connects to can cause the driver to write uncontrolled data outside the bounds of a heap allocation while processing incoming encrypted traffic after the TLS handshake completes. No authentication or user interaction is required, because the affected processing occurs before any application-level authentication completes. Triggering this issue may lead to memory corruption in the client process, disclosure of adjacent heap memory, or termination of the process."}], "id": "CVE-2026-93393", "lastModified": "2026-09-18T19:05:01.127", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "cna@mongodb.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.2, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/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:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@mongodb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-93393", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-18T17:33:19.062224Z", "version": "2.0.3"}}]}, "published": "2026-09-17T21:17:56.163", "references": [{"source": "cna@mongodb.com", "url": "https://jira.mongodb.org/browse/CDRIVER-6417"}], "sourceIdentifier": "cna@mongodb.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "cna@mongodb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": ["windows"], "status": "affected", "versions": {"scheme": "semver", "value": "2.4.0"}}, {"platform": ["windows"], "status": "affected", "versions": {"scheme": "semver", "value": "[2.3.0,2.3.3]"}}, {"platform": ["windows"], "status": "affected", "versions": {"scheme": "semver", "value": "[2.2.0,2.2.4]"}}, {"platform": ["windows"], "status": "affected", "versions": {"scheme": "semver", "value": "[2.1.0,2.1.2]"}}, {"platform": ["windows"], "status": "affected", "versions": {"scheme": "semver", "value": "[2.0.0,2.0.2]"}}, {"platform": ["windows"], "status": "affected", "versions": {"scheme": "semver", "value": "[1.30.0,1.30.8]"}}, {"platform": ["windows"], "status": "affected", "versions": {"scheme": "semver", "value": "[1.29.0,1.29.2]"}}, {"platform": ["windows"], "status": "affected", "versions": {"scheme": "semver", "value": "[1.28.0,1.28.1]"}}, {"platform": ["windows"], "status": "affected", "versions": {"scheme": "semver", "value": "[1.27.0,1.27.6]"}}, {"platform": ["windows"], "status": "affected", "versions": {"scheme": "semver", "value": "[1.26.0,1.26.2]"}}, {"platform": ["windows"], "status": "affected", "versions": {"scheme": "semver", "value": "[1.25.0,1.25.4]"}}, {"platform": ["windows"], "status": "affected", "versions": {"scheme": "semver", "value": "[1.24.0,1.24.4]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "C Driver", "source": "cna", "vendor": "MongoDB Inc."}, "product": "c_driver", "vendor": "mongodb"}], "created": "2026-09-18T13:15:06.455474+00:00", "updated": "2026-09-18T13:15:06.455501+00:00", "vendors": ["mongodb", "mongodb$PRODUCT$c_driver"]}