Vulnerability Details 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
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 20.2%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-13772
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cpe:2.3:a:ibm:websphere_extreme_scale:8.6.1.0
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cpe:2.3:a:ibm:websphere_extreme_scale:8.6.1.1
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cpe:2.3:a:ibm:websphere_extreme_scale:8.6.1.2
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cpe:2.3:a:ibm:websphere_extreme_scale:8.6.1.3
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cpe:2.3:a:ibm:websphere_extreme_scale:8.6.1.4