CVE-2026-48779

Fixed in a distro release EPSS <1%CVSS 7.5

ws is an open source WebSocket client and server for Node.js. All versions from 1.1.0 up to (but not including) 5.2.5, from 6.0.0 up to 6.2.4, from 7.0.0 up to 7.5.11, and from 8.0.0 up to 8.21.0 are affected by a memory exhaustion DoS vulnerability. A peer can send a high volume of exceptionally small fragments and data chunks, with modest network traffic, to force the remote peer into allocating and holding structural wrappers that consume far more memory than the default documented message-size limit, leading to process termination due to OOM. This issue has been fixed in versions 5.2.5, 6.2.4, 7.5.11, and 8.21.0.

Published 2026-06-16 · CVE record · OSV

Products: websockets ws, Red Hat Cryostat 4 on RHEL 9, Red Hat AMQ Broker 7.13.6, Red Hat AMQ Broker 7.14.1, Red Hat Enterprise Linux 10, Red Hat Cluster Observability Operator 1.5.0, Red Hat Developer Hub 1.10, Red Hat Developer Hub 1.9, Red Hat Discovery 2, Red Hat Migration Toolkit 1.8, Red Hat OpenShift AI 2.25, Red Hat OpenShift AI 3.4, Red Hat Openshift Data Foundation 4.18, Red Hat Openshift Data Foundation 4.19, Red Hat Openshift Data Foundation 4.20, Red Hat OpenShift Dev Spaces 3.29, Red Hat OpenShift Service Mesh 2.6, Red Hat OpenShift Service Mesh 3.0, Red Hat OpenShift Service Mesh 3.1, Red Hat OpenShift Service Mesh 3.2, Red Hat OpenShift Service Mesh 3.3, Red Hat Trusted Artifact Signer 1.4, Red Hat Cryostat 4, Red Hat Gatekeeper 3, Red Hat Node HealthCheck Operator, Red Hat OpenShift Lightspeed, Red Hat OpenShift Pipelines, Red Hat OpenShift Service Mesh 3, Red Hat Ansible Automation Platform 2, Red Hat build of Apache Camel for Spring Boot 4, Red Hat build of Apache Camel - HawtIO 4, Red Hat Build of Keycloak, Red Hat Build of Podman Desktop, Red Hat Build of Podman Desktop - Tech Preview, Red Hat Connectivity Link 1, Red Hat Data Grid 8, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat Fuse 7, Red Hat Hardened Images, Red Hat JBoss Enterprise Application Platform 8, Red Hat JBoss Enterprise Application Platform Expansion Pack, Red Hat OpenShift AI (RHOAI), Red Hat OpenShift Container Platform 4, Red Hat OpenShift Virtualization 4, Red Hat Quay 3, Red Hat Satellite 6, Red Hat Self-service automation portal 2

Fixed upstream

Distro releases