Resource exhaustion in Red Hat Exploit Intelligence
CVE-2026-87742
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).
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
Frequently asked questions
- What is CVE-2026-87742?
- CVE-2026-87742 is a high-severity vulnerability in Red Hat Exploit Intelligence, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-09-17.
- How severe is CVE-2026-87742?
- High severity. CVSS v3 base score is 7.5 out of 10.