CVE-2026-2303

Medium

Description

The mongo-go-driver repository contains CGo bindings for GSSAPI (Kerberos) authentication on Linux and macOS. The C wrapper implementation contains a heap out-of-bounds read vulnerability due to incorrect assumptions about string termination in the GSSAPI standard. Since GSSAPI buffers are not guaranteed to be null-terminated or have extra padding, this results in reading one byte past the allocated heap buffer.

SeverityMedium

CVSS6.5

Exploit probability—

ProductGo.mongodb.org/mongo-driver

PublishedFeb 10, 2026

First seenFeb 10, 2026

Weakness typeCWE-183CWE-183

How to fix

Update

go.mongodb.org/mongo-driver1.17.7 or later
go.mongodb.org/mongo-driver/v22.4.2 or later

Affected products

Product	Affected versions	Fixed in
go.mongodb.org/mongo-driverGo	v < 1.17.7	1.17.7
go.mongodb.org/mongo-driver/v2Go	v < 2.4.2	2.4.2

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