What is CVE-2026-16426?

CVE-2026-16426 is a medium-severity vulnerability in IBM Concert, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2026-09-22.

How severe is CVE-2026-16426?

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

SSRF in IBM Concert

CVE-2026-16426

IBM Concert 1.0.0 through 3.0.0 is vulnerable to server-side request forgery (SSRF). This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-09-22.

CVSS v3 metric

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

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

www.ibm.com/support/pages/node/7288830 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-16426?: CVE-2026-16426 is a medium-severity vulnerability in IBM Concert, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2026-09-22.
How severe is CVE-2026-16426?: Medium severity. CVSS v3 base score is 6.5 out of 10.