CVE-2026-87742
Quarkus-websockets-next: denial of service (oom) in quarkus-websockets-next via unbounded message buffering
- State
- Published
- Severity
- 7.5 High
- Published
- Sep 17, 2026
- Updated
- Oct 9, 2026
- Reserved
- Sep 9, 2026
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).
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | redhat |
Weaknesses
- CWE-770 Allocation of Resources Without Limits or Throttling
Affected Products
| Product | Versions |
|---|---|
Red Hat build of Quarkus 3.27.5.SP2Red Hat | |
Red Hat build of Quarkus 3.33.3.SP2Red Hat | |
Exploit IntelligenceRed Hat | |
Red Hat Enterprise Linux AI (RHEL AI) 3Red Hat | |
Red Hat Enterprise Linux AI (RHEL AI) 3Red Hat | |
Red Hat Enterprise Linux AI (RHEL AI) 3Red Hat | |
Red Hat Enterprise Linux AI (RHEL AI) 3Red Hat |
References
- RHSA-2026:69440vendor-advisory
- RHSA-2026:69470vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-87742vdb-entry
- RHBZ#2530522issue-tracking
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