CyberRota Analysis
This is a high severity vulnerability with a CVSS score of 7.5. It may be remotely exploitable.
CVE
CVE-2026-13759
Severity
HIGH
CVSS
7.5
EPSS
0.30%
Original NVD Description
IBM WebSphere Extreme Scale 8.6.1.0 through 8.6.1.6 ships three ObjectInputStream subclasses (WsObjectInputStream, ObjectStreamPool$ReusableInputStream, ObjectInputStreamResolver) that install no JEP-290 class filter; when Coherence is on the classpath, multiple RCE gadget chains including RemoteConstructor.readResolve and PriorityQueue/ExtractorComparator are confirmed working, allowing a post-login attacker who can write a session attribute or a LAN-adjacent attacker on the grid replication wire to execute arbitrary code on peer WAS JVMs
Related CVEs
Other vulnerabilities affecting the same vendor(s)