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An incorrect numeric type conversion in the BSON document building component of the MongoDB C++ Driver may cause a length value to be interpreted incorrectly. When an application supplies an extremel…

Medium CVSS 5.1
CVECVE-2026-84966
First seen2026-09-22 16:16 UTC
Disclosed2026-09-03 16:18 UTC
Last updated2026-09-22 16:16 UTC
Channel statusauto

Summary

An incorrect numeric type conversion in the BSON document building component of the MongoDB C++ Driver may cause a length value to be interpreted incorrectly. When an application supplies an extremely large, non-terminated field name to the builder, the library may read memory outside the intended buffer and terminate the calling process. No authentication is required, but the calling application must pass the oversized name in a specific form.

In-depth triage

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Affected products

  • :

Sources

  • NVD DATABASE

Original Links

Timeline

  1. nvd_ingest NVD