Deserialization in Red Hat Jboss Enterprise Application Platform 7
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.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (22.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.001
Affected products
- Red Hat Jboss Enterprise Application Platform 7
- Red Hat Jboss Enterprise Application Platform 7.4.25
- Red Hat Jboss Enterprise Application Platform 7.4 Els On Rhel 7 — versions 0:2.16.0-22.redhat_00057.1.el7eap, 0:2.3.14-11.SP11_redhat_00001.1.el7eap, 0:1.5.26-2.Final_redhat_00001.1.el7eap
- Red Hat Jboss Enterprise Application Platform 8
- Red Hat Jboss Enterprise Application Platform Expansion Pack
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-15555 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- access.redhat.com/errata/RHSA-2026:53644 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:53806 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:53645 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:53646 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:70228 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:70229 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:70230 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:70277 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-15555?
- CVE-2026-15555 is a high-severity vulnerability in Red Hat Jboss Enterprise Application Platform 7, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-08-11.
- How severe is CVE-2026-15555?
- High severity. CVSS v3 base score is 8.8 out of 10.