CVE-2026-13773

CriticalCVSS 10.0/10Last modified Oct 25, 2026

Description

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.

Metrics

CVSS 3.1 10.0/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-918

Affected software

VendorProductVersions
IBMWebSphere Extreme Scale>= 8.6.1.0, <= 8.6.1.6

References

Timeline

Published
Jun 30, 2026
Last modified
Oct 25, 2026
NVD status
Analyzed

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CVE-2026-13773: Critical severity, CVSS 10.0 | Vulnix