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.

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 ev…

Vulnerability class: Insecure Deserialization

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.

Affected products

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

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.