CVE-2026-87742

Quarkus-websockets-next: denial of service (oom) in quarkus-websockets-next via unbounded message buffering

Published: Sep 17, 2026Updated: Sep 22, 2026 Sources: CVE List NVDCWE-770

7.5HIGH

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).

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

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Weaknesses

CWE-770

Affected Products

Red Hat

commercial·US

Exploit IntelligenceOn-prem

Operating Systems / linux-distro

Red Hat Enterprise Linux AI (RHEL AI) 3On-premOS

Operating Systems / linux-distro

Exploitability

Workaround Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Impact

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References

https://access.redhat.com/errata/RHSA-2026:69440

access.redhat.com

https://access.redhat.com/errata/RHSA-2026:69470

access.redhat.com

https://access.redhat.com/security/cve/CVE-2026-87742

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