CVE-2026-13773CWE-918

IBM WebSphere eXtreme Scale is affected by server side request forgery when ORB is used as Transport Protocol

Medium · published June 30, 2026

CVSS v3.1
6.0
EPSS
6%
Percentile
93.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.0 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.06097 · 93.4th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-06-30T19:20Z
EPSS history
Timeline
  • 30 JUN 19:20Z
    IBM WebSphere eXtreme Scale is affected by server side request forgery when ORB is used as Transport Protocol
    cvelistv5