A flaw was found in JBoss marshalling. The Infinispan session replication path deserializes replicated session data via the JBoss Marshalling River unmarshaller with no class filtering — enabling RCE via deserialization gadget chains on every cluster node.
CVE-2026-15555
CVSS base score
8.8 (v3.1)
Severity
HIGH
Attack vector
Adjacent_network
Weakness
CWE-502
Last modified
October 30, 2026
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H