CVE-2026-16426 Multiple Vulnerabilities in IBM Concert Software
An authenticated attacker can exploit SSRF in IBM Concert to send unauthorized requests, enabling network enumeration and facilitating further attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16426?
CVE-2026-16426 is a medium-severity server-side request forgery vulnerability in IBM Concert, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-918
Which versions are affected by CVE-2026-16426?
How do I fix CVE-2026-16426?
No fix has been published for CVE-2026-16426 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-16426 being exploited?
There is no known exploitation of CVE-2026-16426 in the wild and no public exploit code.
Sources
Also known as GHSA-5qvp-8272-9f7r.