CVE-2026-13772: 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…

PriorityP264critical9.9CVSS 3.1

AVNACLPRLUINSCCHIHAH

EPSS

0.28%

20.3th percentile

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

Affected

1 ranges

Vendor	Product	Version range	Fixed in
ibm	websphere_extreme_scale	8.6.1.0 – 8.6.1.6	—

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