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CVE-2026-96746

Status: Awaiting AnalysisHigh (8.3)—

An out-of-bounds write in the connection-monitoring logic of the MongoDB C Driver may allow an unauthenticated party who controls name resolution and the responses of the hosts named in a client's connection string to write beyond the end of a heap buffer. This may cause the application using the driver to terminate unexpectedly.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Vulnerabilidad OOB write en driver MongoDB (CWE-787) explotable remotamente sin autenticación controlando resolución DNS, causando DoS por terminación inesperada de la aplicación.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Mongodb — C DriverAI

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-96746",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-96746",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
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            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          ],
          "version": "2.0.3",
          "timestamp": "2026-09-24T17:10:23.359575Z"
        }
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    "cvssMetricV31": [
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          "attackVector": "NETWORK",
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          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
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          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "cna@mongodb.com",
        "cvssData": {
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          "version": "4.0",
          "Recovery": "NOT_DEFINED",
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          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/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",
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          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "vulnAvailabilityImpact": "HIGH",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
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          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
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  },
  "affected": [
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      "affectedData": [
        {
          "vendor": "MongoDB",
          "product": "C Driver",
          "versions": [
            {
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              "version": "0",
              "lessThan": "1.30.12",
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              "version": "2.0.0",
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  "published": "2026-09-24T16:17:27.460",
  "references": [
    {
      "url": "https://github.com/mongodb/mongo-c-driver/releases/tag/1.30.12",
      "source": "cna@mongodb.com"
    },
    {
      "url": "https://github.com/mongodb/mongo-c-driver/releases/tag/2.5.5",
      "source": "cna@mongodb.com"
    },
    {
      "url": "https://github.com/mongodb/mongo-c-driver/security/advisories/GHSA-frjf-h5jg-4v46",
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  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
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      "source": "cna@mongodb.com",
      "description": [
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          "lang": "en",
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      ]
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    }
  ],
  "lastModified": "2026-09-24T21:04:40.340",
  "sourceIdentifier": "cna@mongodb.com"
}