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Vulnerability record · CVE-2026-15555 · published 11 August 2026

CVE-2026-15555: Deserialization of untrusted data vulnerability

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.

8.8 CVSS 3.1 High EPSS 0.32% · top 77.7% CWE-502 · Deserialization of untrusted data Awaiting Analysis
8.8CVSS 3.1 base score
0.32%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
10References
25 Sep 2026Last modified by NVD

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

References

LinkTags
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
https://access.redhat.com/errata/RHSA-2026:70229
https://access.redhat.com/errata/RHSA-2026:70230
https://access.redhat.com/errata/RHSA-2026:70277
https://access.redhat.com/security/cve/CVE-2026-15555
https://bugzilla.redhat.com/show_bug.cgi?id=2480637

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Source: NIST National Vulnerability Database (record CVE-2026-15555), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.