CVE-2026-81624

Published: Aug 31, 2026Modified: Sep 10, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: secalert@redhat.com (Secondary)

Description

Undertow is a flexible performant web server used in JBoss EAP and WildFly. A flaw was found in how Undertow handles WebSocket connections. Specifically, certain configuration limits like message buffer sizes and session timeouts cannot be adjusted and default to being unlimited. This allows a remote attacker to send large amounts of data or maintain connections indefinitely, potentially crashing the server by exhausting its memory or other resources.

Related CWEs

CWE-770

Allocation of Resources Without Limits or Throttling

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.

References (2)

https://access.redhat.com/security/cve/CVE-2026-81624

Source: secalert@redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2524868

Source: secalert@redhat.com

Timeline

No history available yet.