CVE-2026-17440 IBM App Connect Enterprise and IBM Integration Bus for z/OS Adapter nodes are vulnerable to multiple CVEs

Medium 5.5 Published 4 Sep 2026 Updated 4 Sep 2026

A local attacker can cause a denial of service in IBM App Connect Enterprise and Integration Bus for z/OS via uncontrolled recursion in adapter nodes.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-17440?

CVE-2026-17440 is a medium-severity denial of service vulnerability in IBM App Connect Enterprise, published on 4 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

IBM App Connect Enterprise 13.0.1.0 through 13.0.8.1, and 12.0.1.0 through 12.0.12.28 and IBM Integration Bus for z/OS 10.1.0.0 through 10.1.0.7 could allow a local attacker to cause a denial of service due to uncontrolled recursion.

Weakness: CWE-674

Which versions are affected by CVE-2026-17440?

It affects 2 products.

Products include Ibm App Connect Enterprise, Ibm Integration Bus for Z\/Os.

How do I fix CVE-2026-17440?

No fix has been published for CVE-2026-17440 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-17440 being exploited?

There is no known exploitation of CVE-2026-17440 in the wild and no public exploit code.

Sources

Also known as GHSA-g698-32cx-8794.