A flaw was found in quarkus-websockets-next. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by streaming messages over a single connection faster than the application can process them. Due to unbounded message buffering and a lack of read backpressure, this rapidly exhausts heap space, leading to a java.lang.OutOfMemoryError that crashes the Java Virtual Machine (JVM).
Advisories

No advisories yet.

Fixes

Solution

No solution given by the 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.

History

Thu, 17 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Thu, 17 Sep 2026 15:15:00 +0000

Type Values Removed Values Added
Description A flaw was found in quarkus-websockets-next. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by streaming messages over a single connection faster than the application can process them. Due to unbounded message buffering and a lack of read backpressure, this rapidly exhausts heap space, leading to a java.lang.OutOfMemoryError that crashes the Java Virtual Machine (JVM).
Title Quarkus-websockets-next: denial of service (oom) in quarkus-websockets-next via unbounded message buffering
First Time appeared Redhat
Redhat enterprise Linux Ai
Redhat exploit Intelligence
Redhat quarkus
Weaknesses CWE-770
CPEs cpe:/a:redhat:enterprise_linux_ai:3
cpe:/a:redhat:exploit_intelligence:0
cpe:/a:redhat:quarkus:3
Vendors & Products Redhat
Redhat enterprise Linux Ai
Redhat exploit Intelligence
Redhat quarkus
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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-17T15:19:18.251Z

Reserved: 2026-09-09T05:58:00.263Z

Link: CVE-2026-87742

cve-icon Vulnrichment

Updated: 2026-09-17T15:19:14.295Z

cve-icon NVD

Status : Received

Published: 2026-09-17T15:16:56.137

Modified: 2026-09-17T16:18:28.003

Link: CVE-2026-87742

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses