Vulnerability-Lookup

FKIE_CVE-2026-93393

Vulnerability from fkie_nvd - Published: 2026-09-17 21:17 - Updated: 2026-09-17 21:17

Severity

8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

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, or an attacker able to impersonate or redirect the client's connection, can cause the driver to write attacker-supplied data outside the bounds of a heap allocation while processing incoming encrypted traffic. No authentication or user interaction is required, because the affected processing occurs before any application-level authentication completes. Successful exploitation may lead to memory corruption in the client process, disclosure of adjacent heap memory, or termination of the process.

References

	URL	Tags
	cna@mongodb.com	https://jira.mongodb.org/browse/CDRIVER-6417

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "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, or an attacker able to impersonate or redirect the client\u0027s connection, can cause the driver to write attacker-supplied data outside the bounds of a heap allocation while processing incoming encrypted traffic. No authentication or user interaction is required, because the affected processing occurs before any application-level authentication completes. Successful exploitation may lead to memory corruption in the client process, disclosure of adjacent heap memory, or termination of the process."
    }
  ],
  "id": "CVE-2026-93393",
  "lastModified": "2026-09-17T21:17:56.163",
  "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"
      }
    ]
  },
  "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": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "cna@mongodb.com",
      "type": "Secondary"
    }
  ]
}

CVE-2026-93393 (GCVE-0-2026-93393)

Vulnerability from cvelistv5 – Published: 2026-09-17 20:26 – Updated: 2026-09-17 20:26

Title

Heap overflow via oversized decrypted TLS record sequence in Windows Secure Channel stream

Summary

Severity

9.2 (Critical)


                        
                          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

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-787 - Out-of-bounds Write

Assigner

mongodb mitre root

References

1 reference

URL	Tags
https://jira.mongodb.org/browse/CDRIVER-6417

Impacted products

1 product

Vendor	Product	Version
MongoDB Inc.	C Driver	Affected: 2.4.0 (semver) Affected: 2.3.0 , ≤ 2.3.3 (semver) Affected: 2.2.0 , ≤ 2.2.4 (semver) Affected: 2.1.0 , ≤ 2.1.2 (semver) Affected: 2.0.0 , ≤ 2.0.2 (semver) Affected: 1.30.0 , ≤ 1.30.8 (semver) Affected: 1.29.0 , ≤ 1.29.2 (semver) Affected: 1.28.0 , ≤ 1.28.1 (semver) Affected: 1.27.0 , ≤ 1.27.6 (semver) Affected: 1.26.0 , ≤ 1.26.2 (semver) Affected: 1.25.0 , ≤ 1.25.4 (semver) Affected: 1.24.0 , ≤ 1.24.4 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
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        }
      ],
      "metrics": [
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          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
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            "attackRequirements": "PRESENT",
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            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
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        {
          "url": "https://jira.mongodb.org/browse/CDRIVER-6417"
        }
      ],
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    "datePublished": "2026-09-17T20:26:38.911Z",
    "dateReserved": "2026-09-17T20:10:59.785Z",
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    "state": "PUBLISHED"
  },
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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FKIE_CVE-2026-93393

CVE-2026-93393 (GCVE-0-2026-93393)

Tags

Sightings

Nomenclature

Related by attack behaviour