What is CVE-2026-11906?

CVE-2026-11906 is a medium-severity vulnerability in IBM Db2, classified under Improper Validation of Specified Quantity in Input. CVSS score: 6.5/10. Published 2026-06-30.

How severe is CVE-2026-11906?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in IBM Db2

CVE-2026-11906

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow an authenticated user to cause a denial of service due to improper neutralization of special elements in the data query logic of XMLTable-derived columns.

Published 2026-06-30 · last modified 2026-07-02.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (34.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-1284 — Improper Validation of Specified Quantity in Input

References

www.ibm.com/support/pages/node/7277423 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-11906?: CVE-2026-11906 is a medium-severity vulnerability in IBM Db2, classified under Improper Validation of Specified Quantity in Input. CVSS score: 6.5/10. Published 2026-06-30.
How severe is CVE-2026-11906?: Medium severity. CVSS v3 base score is 6.5 out of 10.