medium6.5
CVE-2026-2303
mongo-go-driver has Heap Out-of-Bounds Read in GSSAPI Error Handling
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | go.mongodb.org/mongo-driver | < 1.17.7 | 1.17.7 |
| go | go.mongodb.org/mongo-driver/v2 | < 2.4.2 | 2.4.2 |