Answer in brief
CVE-2026-15555 records a High severity (CVSS 8.8) vulnerability in Jboss-marshalling-river: wildfly-clustering-infinispan-marshalling: jboss deserialization rce via unfiltered river unmarshaller. The current sources do not mark it as known exploited. The current feed maps Red Hat/jboss-marshalling-river (generic), Red Hat/wildfly-clustering-infinispan-marshalling (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Red Hat/jboss-marshalling-river (generic), Red Hat/wildfly-clustering-infinispan-marshalling (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Red Hat/jboss-marshalling-rivergeneric | * | Not reported |
| Red Hat/wildfly-clustering-infinispan-marshallinggeneric | * | Not reported |
Published upstream
Aug 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.