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.
Published: 2026-08-31
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Tracking

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Advisories

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History

Tue, 01 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 31 Aug 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat build Of Apache Camel For Spring Boot
Redhat jboss Enterprise Application Platform Expansion Pack
Redhat quay 3
Vendors & Products Redhat build Of Apache Camel For Spring Boot
Redhat jboss Enterprise Application Platform Expansion Pack
Redhat quay 3

Mon, 31 Aug 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Mon, 31 Aug 2026 09:00:00 +0000

Type Values Removed Values Added
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.
Title Undertow-core: undertow: websocketcontainer defaults for buffers and timeouts are infinite
First Time appeared Redhat
Redhat camel Spring Boot
Redhat enterprise Linux
Redhat jboss Enterprise Application Platform
Redhat jboss Fuse
Redhat jbosseapxp
Redhat red Hat Single Sign On
Weaknesses CWE-770
CPEs cpe:/a:redhat:camel_spring_boot:4
cpe:/a:redhat:jboss_enterprise_application_platform:7
cpe:/a:redhat:jboss_enterprise_application_platform:8
cpe:/a:redhat:jboss_fuse:7
cpe:/a:redhat:jbosseapxp
cpe:/a:redhat:red_hat_single_sign_on:7
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat camel Spring Boot
Redhat enterprise Linux
Redhat jboss Enterprise Application Platform
Redhat jboss Fuse
Redhat jbosseapxp
Redhat red Hat Single Sign On
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Redhat Build Of Apache Camel For Spring Boot Camel Spring Boot Enterprise Linux Jboss Enterprise Application Platform Jboss Enterprise Application Platform Expansion Pack Jboss Fuse Jbosseapxp Quay 3 Red Hat Single Sign On
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-01T15:08:08.609Z

Reserved: 2026-08-27T08:40:49.997Z

Link: CVE-2026-81624

cve-icon Vulnrichment

Updated: 2026-09-01T15:08:00.501Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-08-31T09:17:03.453

Modified: 2026-09-01T21:03:04.987

Link: CVE-2026-81624

cve-icon Redhat

Severity : Important

Publid Date: 2026-08-27T00:00:00Z

Links: CVE-2026-81624 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-31T21:21:48Z

Weaknesses