CVE-2026-13773

MEDIUM

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

Title source: cna

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.

References (1)

Core 1

Core References

Vendor Advisory vendor-advisory patch

https://www.ibm.com/support/pages/node/7278594

Scores

CVSS v3 6.0

EPSS 0.0341

EPSS Percentile 87.5%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-918

Status published

Products (2)

IBM/WebSphere Extreme Scale 8.6.1.0 - 8.6.1.6

ibm/websphere_extreme_scale 8.6.1.0 - 8.6.1.6

Published Jun 30, 2026

Tracked Since Jul 01, 2026