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CVE-2026-106432

Status: Awaiting AnalysisLow (2)—

The BSON encoder in the MongoDB PHP Driver converts a string length to a 32-bit value without validation. When an affected application encodes a string near 4 GiB, the allocation size can wrap while the copy operation uses the original length. The resulting heap buffer overflow can corrupt process memory or terminate the PHP process. Reaching this issue requires a non-default runtime configuration that permits multi-gigabyte values. No MongoDB server interaction is required.

CVSS

Exploitation probability (EPSS)

FIRST hasn't scored this CVE yet (usual for very recent or rejected CVEs).

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.

Acceso local con privilegios de usuario (AV:L, PR:L) sin interacción del usuario; heap buffer overflow que causa DoS (terminación del proceso) y corrupción de memoria. CWE-681 indica integer overflow/underflow.

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

Threat Intelligence ProgramRestrict File and Directory PermissionsRemote Data StorageFilter Network TrafficExecution PreventionEncrypt Sensitive Information

Affected technologies (1)

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

Mongodb — PHP DriverAI

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-106432",
  "cveTags": [],
  "metrics": {
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          "options": [
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-10-08T19:51:29.386617Z"
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    "cvssMetricV31": [
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        "cvssData": {
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          "valueDensity": "NOT_DEFINED",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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              "version": "1.16.0",
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  "published": "2026-10-08T20:17:30.647",
  "references": [
    {
      "url": "https://jira.mongodb.org/browse/PHPC-2741",
      "source": "cna@mongodb.com"
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  "vulnStatus": "Awaiting Analysis",
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  ],
  "lastModified": "2026-10-08T20:49:23.240",
  "sourceIdentifier": "cna@mongodb.com"
}