CVE-2026-10109: IBM DB2

Critical severity, CVSS 9.8. EPSS: 0.9% chance of exploitation in the next 30 days.

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to remote code execution due to improper pre-auth DRDA handshake handling.

Affected products

• IBM DB2: from 11.5.0, up to and including 11.5.9; from 12.1.0, up to and including 12.1.4

Published 2026-06-30. Last modified 2026-07-02.