HIGHVulnerability
Verified
Global
NVD HIGH: CVE-2026-15565 — A flaw was found in Undertow. A remote attacker can cause Out of Memory on webso...
·Source: NIST NVD
Updated:
Executive Summary
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.
Analysis
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. CVSS Score: 7.5. Published: 2026-08-11T09:17:13.370.