CVE-2026-84970 (GCVE-0-2026-84970)
Vulnerability from cvelistv5
Published
2026-09-03 14:56
Modified
2026-09-03 15:17
Severity ?
5.9 (Medium) - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
6.2 (Medium) - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
CWE
  • CWE-681 - Incorrect Conversion between Numeric Types
Summary
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.
References
Impacted products
Vendor Product Version
MongoDB C++ Driver Version: 3.2.0   ≤
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