CVE-2026-13772
IBM WebSphere eXtreme Scale's OQL is affected by remote code execution
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
INFO
Published Date :
June 30, 2026, 7:21 p.m.
Last Modified :
June 30, 2026, 7:21 p.m.
Remotely Exploit :
Yes !
Source :
ibm
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 9a959283-ebb5-44b6-b705-dcc2bbced522 |
Solution
- Update WebSphere Extreme Scale to a patched version.
- Implement an allow-list for class names.
- Restrict instantiation of untrusted objects.
- Apply JEP-290 serialization filters.
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