{ "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" } } ] } }