Is CVE-2026-106428 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-106428?

CVE-2026-106428 has a CVSS v3 severity of LOW (3.7).

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CVE-2026-106428

Description

An out-of-bounds read in SCRAM authentication response parsing in the MongoDB C Driver can read one byte beyond a fixed-size buffer when processing a malformed server-final message. A server or network intermediary able to provide this message before server-signature verification can cause the application using the driver to terminate. The extra byte is not returned through the protocol.