CVE-2026-15555
Received Received - Intake

Remote Code Execution in JBoss Marshalling via Infinispan Session Replication

Publication date: 2026-08-11

Last updated on: 2026-08-11

Assigner: Red Hat, Inc.

Description
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.

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Meta Information

Published
2026-08-11
Last Modified
2026-08-11
Generated
2026-08-11
AI Q&A
2026-08-11
EPSS Evaluated
N/A
NVD
CVE-2026-15555
EUVD
EUVD-2026-55982

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
red_hat jboss_marshalling *
red_hat wildfly *
red_hat infinispan *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

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Executive Summary

CVE-2026-15555 is a flaw in JBoss marshalling where the Infinispan session replication path deserializes session data without proper class filtering. This allows remote code execution via deserialization gadget chains on all cluster nodes.

Detection Guidance

Detect this vulnerability by checking if your system uses JBoss Marshalling or WildFly with Infinispan session replication. Inspect logs for deserialization errors or unusual network traffic between cluster nodes. Use network scanners to identify exposed JGroups ports (default 7600) and verify if AUTH protocol is missing. Check for unfiltered River unmarshaller usage in session replication paths.

Impact Analysis

An attacker on the same network could exploit this to execute arbitrary code on cluster nodes, potentially leading to data breaches, system compromise, or denial of service. The attack requires no authentication or user interaction.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR's confidentiality requirements and HIPAA's security rules. Non-compliance may result in legal penalties, fines, or reputational damage.

Mitigation Strategies

Apply vendor patches for JBoss Marshalling and WildFly. Enable AUTH protocol in JGroups to prevent unauthenticated cluster joins. Add ClassResolverFilter to SessionMarshallerFactory and JBossByteBufferMarshaller. Isolate cluster nodes from untrusted networks. Monitor for suspicious deserialization activity and update security scanners to avoid false positives from backported fixes.

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