CVE-2026-2303: The mongo-go-driver repository contains CGo bindings for GSSAPI (Kerberos) authentication on Linux and macOS. The C wrapper implementation contains a heap…

PriorityP337medium6.5CVSS 3.1

AVNACLPRLUINSUCNIHAN

EPSS

0.22%

12.8th percentile

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.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
go.mongodb.org	mongo-driver	>= 0 < 1.17.7	1.17.7
go.mongodb.org	mongo-driver_v2	>= 0 < 2.4.2	2.4.2
mongodb_inc	mongodb_go_driver	>= 1.0.0 < 1.17.7	1.17.7
mongodb_inc	mongodb_go_driver	>= 2.0.0 < 2.4.2	2.4.2

CVSS provenance

nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

nvdv4.06.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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