All vulnerabilities
CVE-2026-106428

Out-of-bounds read in SCRAM response parsing in MongoDB C Driver

MongoDB C DriverDatabases
Open in ThreatlineRecord JSON
CVSS
6.3Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.24%Chance of exploitation activity in the next 30 days, higher than 14% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in1.30.13Also 2.4.0CVE List
Published8 Oct 2026Updated 8 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 2

  • C Driveraffected: 1.1.0 before 1.30.13CVE List
  • C Driveraffected: 2.0.0 before 2.4.0CVE List

References 1