CVE-2026-15565
A flaw was found in Undertow. A remote attacker can cause Out of Memory on websockets endpoint without authentication on any @ServerEndpoint class that has any @OnMessage method. This allows an attacker to cause Denial of Service attack without authentication and using only a standard WebSocket handshake.
- Score
- CVSS 3.1 7.5 High
- Status
- Awaiting Analysis - secalert@redhat.com
- Published
- 2026-08-11
- Last modified
- 2026-10-21
- Weaknesses
- CWE-120
Affected products
- Camel Spring Boot (Redhat)
- Jboss Data Grid (Redhat)
- Jboss Enterprise Application Platform (Redhat)
- Jboss Enterprise Application Platform Els (Redhat)
- Jboss Fuse (Redhat)
- Jbosseapxp (Redhat)
- Red Hat Single Sign On (Redhat)
References
- 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-2026-15565
- https://bugzilla.redhat.com/show_bug.cgi?id=2490628
