What is CVE-2026-17172?

CVE-2026-17172 is a high-severity vulnerability in IBM API Connect, classified under Authentication Bypass by Spoofing. CVSS score: 8.5/10. Published 2026-11-07.

How severe is CVE-2026-17172?

High severity. CVSS v3 base score is 8.5 out of 10.

Vulnerability in IBM API Connect

CVE-2026-17172

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 bypass security restrictions due to improper authentication. Information supplied by the client is not sufficiently verified, which could allow a caller to impersonate another party.

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

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.

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-290 — Authentication Bypass by Spoofing

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-2026-17172?: CVE-2026-17172 is a high-severity vulnerability in IBM API Connect, classified under Authentication Bypass by Spoofing. CVSS score: 8.5/10. Published 2026-11-07.
How severe is CVE-2026-17172?: High severity. CVSS v3 base score is 8.5 out of 10.