CVE-2026-15565
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Aug 11, 2026
Vendor
unknown
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.