mongo-c-driver: The bson_validate function may return early on specific inputs and incorrectly report success
CVE-2026-6231 is fixed in mongo-c-driver on 1 platform, first by DEBIAN-CVE-2026-6231, released April 13, 2026. It is not reported as exploited. Patch Radar priority: High.
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
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| mongo-c-driver · Debian 12.15 (bookworm) | 1.23.1-1+deb12u3 | DEBIAN-CVE-2026-6231 | Apr 13, 2026 |
| mongo-c-driver · Debian 13.5 (trixie) | 1.30.4-1+deb13u2 | DEBIAN-CVE-2026-6231 | Apr 13, 2026 |
| mongo-c-driver · Debian 14 | 2.1.0-1 | DEBIAN-CVE-2026-6231 | Apr 13, 2026 |
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