What is CVE-2026-6231?

CVE-2026-6231 is a medium-severity vulnerability in Mongodb C_driver, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2026-04-13.

How severe is CVE-2026-6231?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Improper input validation in Mongodb C_driver

CVE-2026-6231

The bson_validate function may return early on specific inputs and incorrectly report success. This behavior could result in skipping validation for BSON data, allowing malformed or invalid UTF-8 sequences to bypass validation and be proce…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.001 (16.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Affected products

Mongodb C_driver
Mongodb Inc. C Driver — versions 1.0, 2.0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

cna@mongodb.com (issue-tracking, Patch, Issue Tracking)

Frequently asked questions

What is CVE-2026-6231?: CVE-2026-6231 is a medium-severity vulnerability in Mongodb C_driver, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2026-04-13.
How severe is CVE-2026-6231?: Medium severity. CVSS v3 base score is 4.3 out of 10.