What is CVE-2026-18156?

CVE-2026-18156 is a medium-severity vulnerability in IBM Financial Transaction Manager (Ftm) For Red Hat Openshift, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-09-22.

How severe is CVE-2026-18156?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in IBM Financial Transaction Manager (Ftm) For Red Hat Openshift

CVE-2026-18156

IBM Financial Transaction Manager (FTM) for RedHat OpenShift could allow a remote authenticated attacker to bypass security controls by forging user identities due to improper authorization.

Vulnerability class: Broken Access Control

Published 2026-09-22.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

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 Financial Transaction Manager (Ftm) For Red Hat Openshift

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

www.ibm.com/support/pages/node/7288641 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-18156?: CVE-2026-18156 is a medium-severity vulnerability in IBM Financial Transaction Manager (Ftm) For Red Hat Openshift, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-09-22.
How severe is CVE-2026-18156?: Medium severity. CVSS v3 base score is 6.5 out of 10.