What is CVE-2026-17236?

CVE-2026-17236 is a medium-severity vulnerability in IBM API Connect, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.4/10. Published 2026-11-07.

How severe is CVE-2026-17236?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Auth bypass in IBM API Connect

CVE-2026-17236

IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to obtain sensitive information due to improper authorization. Authorization checks are not applied when certain organization URLs are resolved, which could allow access to information belonging to others.

Vulnerability class: IDOR (Insecure Direct Object Reference)

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

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (21.8th percentile), scored 2026-11-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

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)
www.ibm.com/support/pages/node/7295637 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-17236?: CVE-2026-17236 is a medium-severity vulnerability in IBM API Connect, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.4/10. Published 2026-11-07.
How severe is CVE-2026-17236?: Medium severity. CVSS v3 base score is 6.4 out of 10.