CVE-2026-88035

Fixed in a distro release EPSS <1%CVSS 4.7

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.

Published 2026-09-10 · CVE record · OSV

Products: mongodb c_driver

Distro releases