CVE-2026-15555

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.

CVSS 3.1

8.8CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.9% chance of exploitation in the next 30 days; higher than 60% of CVEs (scores of 2026-10-25)

CWE

CWE-502

Published

2026-08-11

Modified

2026-10-20

Record from

the NVD, synced 2026-10-21

References

• https://access.redhat.com/errata/RHSA-2026:53644
• https://access.redhat.com/errata/RHSA-2026:53645
• https://access.redhat.com/errata/RHSA-2026:53646
• https://access.redhat.com/errata/RHSA-2026:53806
• https://access.redhat.com/errata/RHSA-2026:70228

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