CVE-2026-6231
bson_validate may skip validation when processing certain inputs
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
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 processed incorrectly. The issue may affect applications that rely on these functions to validate untrusted BSON data before further processing. This issue affects MongoDB C Driver versions prior to 1.30.5, MongoDB C Driver version 2.0.0 and MongoDB C Driver version 2.0.1
| CWE | CWE-20 |
| Vendor | mongodb inc. |
| Product | c driver |
| Published | Apr 13, 2026 |
| Last Updated | Apr 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
MongoDB Inc. / C Driver
1.0 < 1.30.5 2.0 < 2.0.2