7.5
High
CVE-2026-15565 A flaw was found in Undertow
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat build of Apache Camel for Spring Boot 4 | Versions not published | |
| Red Hat Data Grid 8 | Versions not published | |
| Red Hat Fuse 7 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 7 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform Expansion Pack | Versions not published | |
| Red Hat Single Sign-On 7 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 7.4.25 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 | Versions not published |
Show the 7 other branches Hide the 7 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8.1 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8.1.8.GA 2.3 | earliest → < 2.3.26.SP3-redhat-00001 | 2.3.26.SP3-redhat-00001 |
References
- RHSA-2026:53644 access.redhat.com
- RHSA-2026:53806 access.redhat.com
- RHSA-2026:70228 access.redhat.com
- RHSA-2026:70229 access.redhat.com
- RHSA-2026:70230 access.redhat.com
- RHSA-2026:70277 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2490628 bugzilla.redhat.com
Timeline
- Published
- Last modified
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