🛡️ CVE-2026-2303 — mongo-driver

🟡 CVSS 6.5 — Medium ✅ No Known Exploit CWE-183 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

mongo-go-driver has Heap Out-of-Bounds Read in GSSAPI Error Handling

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity high, availability none.

Weakness class

CVE-2026-2303 is classified as CWE-183: Permissive List of Allowed Inputs. The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are explicitly allowed by policy because the inputs are assumed to be safe, but the list is too permissive - that is, it allows an input…

Affected software

CVE-2026-2303 is recorded against 3 packages.

  • go.mongodb.org/mongo-driver
  • go.mongodb.org/mongo-driver/v2
  • unknown

Timeline and source

Published on 10 February 2026 and last revised on 24 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

nvd.nist.gov (Advisory)
github.com (Package)
jira.mongodb.org (Web)

Details

Severity Medium
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CWE CWE-183
Public Exploit ✅ No
Source NVD
Published 2026-02-10
Updated 2026-08-12
Modified 2026-07-24
Fix URL N/A

Affected Packages

Software From version Fixed in
go.mongodb.org/mongo-driver — —
go.mongodb.org/mongo-driver/v2 — —
unknown — —

Similar Threats

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