High [CVE-2026-15565] Pre-Auth DoS on websocket endpoint with @ServerEndpoint class with any @OnMessage method
This high-severity Red Hat Linux advisory covers CVE-2026-15565 affecting Red Hat build of Apache Camel for Spring Boot 4, Red Hat Data Grid 8, Red Hat Fuse 7.
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Summary
Pre-Auth DoS on websocket endpoint with @ServerEndpoint class with any @OnMessage method. Red Hat rates this important (CVSS 7.5).
Weakness: CWE-120.
Affected products named by the advisory: Red Hat build of Apache Camel for Spring Boot 4; Red Hat Data Grid 8; Red Hat Fuse 7; Red Hat JBoss Enterprise Application Platform 7; and 2 more.
Affected products named by the advisory: Red Hat JBoss Enterprise Application Platform 8; Red Hat Single Sign-On 7.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- Option 1 — Server-wide configuration to disable websockets handshake: <!-- Remove <websockets/> from standalone.xml servlet-container --> <servlet-container name="default"> <jsp-config/> <!-- <websockets/> ← remove this line entirely --> </servlet-container> isWebsocketsEnabled() returns false → no WebSocket upgrade accepted for any deployment. Option 2 — Per-application configuration to disable websockets handshake: <!-- WEB-INF/jboss-web.xml inside the WAR --> <jboss-web> <enable-websockets>false</enable-websockets> </jboss-web> Only that specific WAR's @ServerEndpoint classes are not registered.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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