What is CVE-2026-18166?

CVE-2026-18166 is a high-severity vulnerability in IBM Db2, classified under Improper Access Control. CVSS score: 7.7/10. Published 2026-10-12.

How severe is CVE-2026-18166?

High severity. CVSS v3 base score is 7.7 out of 10.

Vulnerability in IBM Db2

CVE-2026-18166

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a remote authenticated attacker to obtain sensitive information due to improper authorization when using the CREATE WRAPPER command.

Published 2026-10-12.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

IBM Db2

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

www.ibm.com/support/pages/node/7291606 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-18166?: CVE-2026-18166 is a high-severity vulnerability in IBM Db2, classified under Improper Access Control. CVSS score: 7.7/10. Published 2026-10-12.
How severe is CVE-2026-18166?: High severity. CVSS v3 base score is 7.7 out of 10.