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 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

Score
CVSS 3.1 9.9 Critical
Status
Analyzed - psirt@us.ibm.com
Published
2026-06-30
Last modified
2026-10-25
Weaknesses
CWE-470

Affected products

References

 
 
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