CVE-2026-88035 Affecting mongo-c-driver package, versions <2.5.3-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.1% (1st percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-MONGOCDRIVER-19685356
  • published11 Sept 2026
  • disclosed10 Sept 2026

Introduced: 10 Sep 2026

CVE-2026-88035  (opens in a new tab)

How to fix?

Upgrade Debian:unstable mongo-c-driver to version 2.5.3-1 or higher.

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 Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

A size check in the client-side authentication path of the MongoDB C Driver can wrap around, so an unusually large user-name value is accepted and copied past the end of a small buffer. A party able to set the driver's connection settings may cause the application that embeds the driver to terminate unexpectedly. Reaching this code requires a build in which the optional external SASL authentication backend is present and a connection configured to use it.

CVSS Base Scores

version 3.1