CVE-2026-2303 MEDIUM

CVE-2026-2303: Heap Out-of-Bounds Read in Go Driver GSSAPI C Wrappers enables application crash or information leak

Vendor Mongodb Inc
Product MongoDB Go Driver
Weakness CWE-183
Published February 10, 2026
Last update February 11, 2026

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 10, 2026 CVE published
February 11, 2026 Record updated