What is CVE-2026-17373?

CVE-2026-17373 is a high-severity vulnerability in IBM API Connect, classified under Incorrect Authorization. CVSS score: 7.7/10. Published 2026-11-07.

How severe is CVE-2026-17373?

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

Auth bypass in IBM API Connect

CVE-2026-17373

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.

Vulnerability class: Broken Access Control

Published 2026-11-07 · last modified 2026-11-08.

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

EPSS: 0.004 (38.4th percentile), scored 2026-11-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.4% 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-863 — Incorrect Authorization

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-2026-17373?: CVE-2026-17373 is a high-severity vulnerability in IBM API Connect, classified under Incorrect Authorization. CVSS score: 7.7/10. Published 2026-11-07.
How severe is CVE-2026-17373?: High severity. CVSS v3 base score is 7.7 out of 10.