WebSphere Extreme Scale vulnerabilities

4 known vulnerabilities in WebSphere Extreme Scale from IBM. 4 are rated high or critical. Each entry lists the affected versions and the release that fixes it, where the vendor has published one.

Latest first

• 9.1 Critical severity

  IBM WebSphere Extreme Scale 8.6.1.0 through 8.6.2.2 could allow a remote attacker to bypass…

  CVE-2026-101117Nov 8, 2026IBM

  IBM WebSphere Extreme Scale 8.6.1.0 through 8.6.2.2 could allow a remote attacker to bypass security restrictions due to improper Content Security Policy configuration.

• 10.0 Critical severity

  WebSphere Extreme Scale: Server-Side Request Forgery

  CVE-2026-13773Jun 30, 2026IBMEPSS 6.1%

  IBM WebSphere Extreme Scale 8.6.1.0 through 8.6.1.6 Approximately 50 generated CORBA stub classes in WebSphere eXtreme Scale's ogclient.jar call ORB.string_to_object() on an attacker-controlled IOR string during Java deserialization, turning any unfiltered Obj

• 9.9 Critical severity

  WebSphere Extreme Scale: Use of Externally-Controlled Input to Select Classes or Code

  CVE-2026-13772Jun 30, 2026IBM

  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-

• 8.8 High severity

  WebSphere Extreme Scale: Deserialization of Untrusted Data

  CVE-2026-13759Jun 30, 2026IBM

  IBM WebSphere Extreme Scale 8.6.1.0 through 8.6.1.6 ships three ObjectInputStream subclasses (WsObjectInputStream, ObjectStreamPool$ReusableInputStream, ObjectInputStreamResolver) that install no JEP-290 class filter; when Coherence is on the classpath, multip