CVE-2026-13773: medium-severity vulnerability in IBM WebSphere Extreme Scale
IBM WebSphere eXtreme Scale is affected by server side request forgery when ORB is used as Transport Protocol
Published
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6epss 6.1%
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:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
Affected products
IBM · WebSphere Extreme ScaleRelated CVEs — IBM WebSphere Extreme Scale
In the same product, most dangerous first.
CVE-2026-13759HIGHIBM WebSphere eXtreme Scale is affected by Insecure DeserilizationEPSS 0.5%CVE-2026-13772HIGHIBM WebSphere eXtreme Scale's OQL is affected by remote code executionEPSS 0.5%CVE-2026-9002MEDIUMIBM WebSphere eXtremes Scale is affected by uncontrolled resource consumption when XDF is enabledEPSS 0.3%