What is CVE-2026-17311?

CVE-2026-17311 is a high-severity vulnerability in IBM API Connect, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.1/10. Published 2026-11-07.

How severe is CVE-2026-17311?

High severity. CVSS v3 base score is 7.1 out of 10.

Auth bypass in IBM API Connect

CVE-2026-17311

IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to modify application API subscriptions due to broken object-level authorization.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-11-07 · last modified 2026-11-07.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L.

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 API Connect

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

www.ibm.com/support/pages/node/7295635 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-17311?: CVE-2026-17311 is a high-severity vulnerability in IBM API Connect, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.1/10. Published 2026-11-07.
How severe is CVE-2026-17311?: High severity. CVSS v3 base score is 7.1 out of 10.