CVE-2026-13772: high-severity vulnerability in IBM WebSphere Extreme Scale
IBM WebSphere eXtreme Scale's OQL is affected by remote code execution
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.5%
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
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
IBM · WebSphere Extreme ScaleRelated CVEs — IBM WebSphere Extreme Scale
In the same product, most dangerous first.
CVE-2026-13773MEDIUMIBM WebSphere eXtreme Scale is affected by server side request forgery when ORB is used as Transport ProtocolEPSS 6.1%CVE-2026-13759HIGHIBM WebSphere eXtreme Scale is affected by Insecure DeserilizationEPSS 0.5%CVE-2026-9002MEDIUMIBM WebSphere eXtremes Scale is affected by uncontrolled resource consumption when XDF is enabledEPSS 0.3%