VULNERABILITY INTELLIGENCE

CVE-2026-84970

CVSS score6.2 MEDIUM
EPSS probability0.12%
CISA KEVNot currently listed
Published2026-09-03
Last modified2026-09-10
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H

Description

A numeric truncation weakness exists in the JSON parsing component of the MongoDB C++ Driver's BSON library. An actor who controls the text that an embedding application hands to the library's public JSON parsing interface, when that text is very large, can cause the library to read memory beyond the supplied buffer and return it to the caller, to silently accept only part of the input as a complete document, or to terminate the process. No MongoDB server, credentials, or non-default configuration is required; the effect is confined to the process that uses the library.

Weakness classification

  • cna@mongodb.com: CWE-681

Primary references