Vulnerability · Published Jun 30, 2026 · Assigned by ibm

CVE-2026-13772IBM WebSphere eXtreme Scale's OQL is affected by remote code execution

High 7.5

In plain English

A high-severity security flaw in WebSphere Extreme Scale from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.5%top 56.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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

Affected products (as reported)

Vendor	Product	Versions
IBM	WebSphere Extreme Scale	8.6.1.0 – through 8.6.1.6

Weakness: CWE-470 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://www.ibm.com/support/pages/node/7278593 vendor-advisory, patch