VULNERABILITY INTELLIGENCE
CVE-2026-15565
CVSS score7.5 HIGH
EPSS probability1.16%
CISA KEVNot currently listed
Published2026-08-11
Last modified2026-11-01
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
Weakness classification
- secalert@redhat.com: CWE-120