CVE-2026-84965 Affecting mongo-c-driver package, versions *


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.09% (1st percentile)

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  • Snyk IDSNYK-ECHOLATEST-MONGOCDRIVER-19529296
  • published4 Sept 2026
  • disclosed3 Sept 2026

Introduced: 3 Sep 2026

NewCVE-2026-84965  (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.

An integer wraparound in an allocation size calculation in the BSON library's JSON parsing code can cause a buffer to be released while a following copy operation still writes through the stale pointer. On builds where sizes are 32 bits, an unauthenticated party able to supply a sufficiently large JSON input to an application that links the library may cause that application to terminate unexpectedly, resulting in denial of service.

CVSS Base Scores

version 3.1