CVE Catalog

CVE-2026-87742

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Elevated risk
0.76%

54th percentile - higher than 54% of all known CVEs

Summary

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).

Risk Assessment

An attacker can remotely crash the JVM and make the application unavailable, posing a serious risk to service continuity.

Recommendation

Update quarkus-websockets-next to a patched version and enforce buffering limits and read backpressure for WebSocket connections.

Related vulnerabilities

Original NVD description (English source)

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).

Vulnerability data from NVD (NIST) · CISA KEV · EPSS