High severity · published Aug 11, 2026
CVE-2026-15555
Jboss-marshalling-river: wildfly-clustering-infinispan-marshalling: jboss deserialization rce via unfiltered river unmarshaller
8.8
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 61% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat JBoss Enterprise Application Platform 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat JBoss Enterprise Application Platform 8.1.8.GA · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat JBoss Enterprise Application Platform Expansion Pack · Red Hat
All versions, or not specified · source: vendor
Affected product
RH
Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7
Red Hat
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-15555
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-15555
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:53644
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:53645
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:53646
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:53806
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:70228
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:70229
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