by Kastro
Paper/Archive/CVE-2026-13773

CVE-2026-13773

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

EPSS 6%CVSS 10.0
critical.is priorityof 100
49
CVSS 10.0 (NVD)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 93.4.934 × 2018.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
WebSphere Extreme Scale8.6.1.0 – 8.6.1.6–CNA

Scores by source

NVD10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
ibm (CNA)6.0CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial

References

patchibm.com/support/pages/node/7278594