SEPTEMBER 17, 2026
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Case File

CVE-2026-84966

MEDIUM · CVSS 5.1 EPSS 0.11%

Source: NVD + CISA KEV + EPSS · Published 2026-09-03 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

The MongoDB C++ Driver is vulnerable due to an incorrect numeric type conversion in its BSON document building component, which can lead to memory reading outside the intended buffer when an application supplies an excessively large, non-terminated field name. This could result in application crashes without requiring authentication, making it a potential vector for denial-of-service attacks. Organizations using the MongoDB C++ Driver should prioritize this vulnerability to mitigate risks associated with application stability and security.

CVE
CVE-2026-84966
Severity
MEDIUM
CVSS
5.1
EPSS
0.11%
MongoDB

Original NVD Description

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.