What is CVE-2026-10543?

CVE-2026-10543 is a high-severity vulnerability in IBM Db2, classified under Improper Authorization. CVSS score: 8.2/10. Published 2026-08-12.

How severe is CVE-2026-10543?

High severity. CVSS v3 base score is 8.2 out of 10.

Auth bypass in IBM Db2

CVE-2026-10543

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5 is vulnerable to privilege escalation with a specially crafted query.

Published 2026-08-12 · last modified 2026-08-18.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (30.9th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

IBM Db2 — versions 11.5.0, 12.1.0

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

www.ibm.com/support/pages/node/7282949 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-10543?: CVE-2026-10543 is a high-severity vulnerability in IBM Db2, classified under Improper Authorization. CVSS score: 8.2/10. Published 2026-08-12.
How severe is CVE-2026-10543?: High severity. CVSS v3 base score is 8.2 out of 10.