CVE-2026-84969 Affecting mongo-c-driver package, versions *


Severity

Recommended
0.0
low
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.17% (7th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ECHOLATEST-MONGOCDRIVER-19529297
  • published4 Sept 2026
  • disclosed3 Sept 2026

Introduced: 3 Sep 2026

NewCVE-2026-84969  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest mongo-c-driver.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mongo-c-driver package and not the mongo-c-driver package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

A memory-handling error in the BSON-to-JSON conversion helpers of the MongoDB C Driver can write a small number of bytes past the end of a heap buffer when a binary field is encoded and the output is cut short at a caller-configured length limit. A party who supplies the document content, with no privileges on the application that links the driver, may cause a small amount of data outside the intended buffer to be altered.

CVSS Base Scores

version 3.1