RCE in Ibm Db2

CVE-2026-10109

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.

Vulnerability class: RCE (Remote Code Execution)

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ibm Db2 — versions 11.5.0, 12.1.0

Weakness classification (CWE)

CWE-94 — Code Injection

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-10109?: CVE-2026-10109 is a critical-severity vulnerability in Ibm Db2, classified under Code Injection. CVSS score: 9.8/10. Published 2026-06-30.
How severe is CVE-2026-10109?: Critical severity. CVSS v3 base score is 9.8 out of 10.