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NVD CRITICAL: CVE-2026-13773 — IBM WebSphere Extreme Scale 8.6.1.0 through 8.6.1.6 Approximately 50 generated C...

·Source: NIST NVD

Updated:

Executive Summary

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 ObjectInputStream sink in WAS into outbound IIOP SSRF to an attacker-chosen host; when chained with the IBM ORB's getUserException class-instan

Analysis

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 ObjectInputStream sink in WAS into outbound IIOP SSRF to an attacker-chosen host; when chained with the IBM ORB's getUserException class-instantiation flaw (WAS-26), this SSRF escalates to remote code execution on the calling JVM. CVSS Score: 6. Published: 2026-06-30T20:17:29.227.

Indicators of Compromise (3)

CVE (1)
CVE-2026-13773
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Jun 30, 2026. Verified by: NIST.

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