CVE-2026-13772 IBM WebSphere eXtreme Scale's OQL is affected by remote code execution

High 7.5 Published 30 Jun 2026 Updated 3 Jul 2026

An authenticated attacker can execute arbitrary code on the JVM by injecting malicious class names into OQL queries in IBM WebSphere eXtreme Scale.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-13772?

CVE-2026-13772 is a high-severity code injection vulnerability in IBM WebSphere Extreme Scale, published on 30 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

IBM WebSphere Extreme Scale 8.6.1.0 through 8.6.1.6 's Object Query Language engine resolves attacker-supplied class names via Class.forName() and invokes their constructors with no allow-list at three distinct sinks (SELECT NEW, enum literals, and reflection-based comparators); an authenticated remote attacker who can influence an application-built OQL query string can execute arbitrary constructors on the WAS JVM, and a SELECT DISTINCT variant using planted grid values fires the same gadget post-readObject in a manner that survives JEP-290 serialization filters across grid node boundaries

Weakness: CWE-470

Which versions are affected by CVE-2026-13772?

It affects 1 product.

Products include Ibm Websphere Extreme Scale.

How do I fix CVE-2026-13772?

No fix has been published for CVE-2026-13772 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2026-13772 being exploited?

There is no known exploitation of CVE-2026-13772 in the wild and no public exploit code.

Sources

Also known as GHSA-w6x5-7fjj-v49p.