CVE-2026-84966 (GCVE-0-2026-84966)
Vulnerability from cvelistv5
Published
2026-09-03 15:00
Modified
2026-09-03 15:38
Severity ?
5.9 (Medium) - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.1 (Medium) - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-681 - Incorrect Conversion between Numeric Types
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.
References
Impacted products
Vendor Product Version
MongoDB C++ Driver Version: 3.2.0   ≤
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