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CVE-2026-84966

BSON element injection via NUL-embedded document keys in builder append PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
MongoDB / C++ Driveraffected 3.2.0 before 4.5.2

CWE

CWE-681

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.