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Fencer Vulns
high 7.5

CVE-2026-48779 json

ws: Memory exhaustion DoS from tiny fragments and data chunks

published 2026-06-15 4 mo ago modified 2026-10-26 13 d ago also GHSA-96hv-2xvq-fx4p , EUVD-2026-37504

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 73%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm ws 5.2.5, 6.2.4, 7.5.11, 8.21.0
  • Red Hat Cryostat 4 on RHEL 9 4.2.0-13
  • Red Hat Red Hat Enterprise Linux 10 0:1.1.2-1.el10_2
  • Red Hat Cluster Observability Operator 1.5.0 1782838476, 1782838753, 1782839193, 1782839279, 1782839494, 1782839658, 1782839981, 1782839996, 1782840519, 1782840539, 1782841925, 1782844225
  • Red Hat Red Hat Developer Hub 1.10 1783448184
  • Red Hat Red Hat Developer Hub 1.9 1782761244
  • Red Hat Red Hat Discovery 2 1782166952
  • Red Hat Red Hat Migration Toolkit 1.8 1783690532
  • Red Hat Red Hat OpenShift AI 2.25 1787801527
  • Red Hat Red Hat OpenShift AI 3.4 1786611759, 1787121387, 1787250508, 1787250617, 1787251250, 1787251550, 1787347991
  • Red Hat Red Hat Openshift Data Foundation 4.18 1783676191, 1783676585, 1783676649, 1783676675, 1783929816, 1784093953, 1784094299, 1784094353, 1784094725, 1784094943, 1786705347, 1786705558, 1786705646, 1786705741, 1786705777, 1786705802, 1786705938, 1786706101, 1786706138, 1786706577
  • Red Hat Red Hat Openshift Data Foundation 4.19 1783684068, 1783684360, 1783684603, 1783684667, 1783684668, 1783684707, 1784054582, 1784054606, 1784054873, 1784055295, 1786701555, 1786701839, 1786702052, 1786702264, 1786702276, 1786702315, 1786702440, 1786702448, 1786702559, 1786702713
  • Red Hat Red Hat Openshift Data Foundation 4.20 1783666755, 1783667125, 1783667517, 1783667577, 1783667611, 1783667641, 1784054598, 1784055020, 1784055387, 1784055726, 1786626399, 1786627106, 1786627460, 1786627559, 1786628142, 1786628235, 1786629478, 1786629761, 1786631508, 1786687918
  • Red Hat Red Hat OpenShift Dev Spaces 3.29 1782498475, 1782498792
  • Red Hat Red Hat OpenShift Service Mesh 2.6 1781937133, 1782287580
  • Red Hat Red Hat OpenShift Service Mesh 3.0 1782201833, 1782201894
  • Red Hat Red Hat OpenShift Service Mesh 3.1 1782201537, 1782201696
  • Red Hat Red Hat OpenShift Service Mesh 3.2 1782201812, 1782201851
  • Red Hat Red Hat OpenShift Service Mesh 3.3 1782201466, 1782231869
  • Red Hat Red Hat Trusted Artifact Signer 1.4 1783327185
  • node-ws Debian 14 8.21.0+~cs14.19.1-1

debian advisories DEBIAN-CVE-2026-48779

  • rh-podman-desktop RHEL 10.2 1.1.2-1.el10_2

red hat advisories RHSA-2026:57590

  • kimi-code openSUSE Leap 16.0 0.42.0-bp160.1.1
  • kimi-code openSUSE Tumbleweed 0.41.0-1.1
  • agama-integration-tests openSUSE Tumbleweed 1785848065.5562c7c-4.1
  • python-bqplot openSUSE Tumbleweed 0.13.1-15.1
  • python-ipympl openSUSE Tumbleweed 0.10.0-18.1
  • python-pydata-sphinx-theme openSUSE Leap 16.0 0.16.1-bp160.2.1
  • heroic-games-launcher openSUSE Tumbleweed 2.22.0-3.1
  • python-jupyter-ydoc openSUSE Tumbleweed 3.5.0-1.1

opensuse advisories openSUSE-SU-2026:21849-1openSUSE-SU-2026:11705-1openSUSE-SU-2026:11452-1openSUSE-SU-2026:11397-1openSUSE-SU-2026:11354-1openSUSE-SU-2026:21173-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-48779 updated cvss 7.5

ws: ws: Denial of Service via memory exhaustion from small WebSocket fragments

  • Red Hat Node HealthCheck Operator workload-availability/node-healthcheck-rhel9-operator, workload-availability/node-healthcheck-operator-bundle, workload-availability/node-healthcheck-must-gather-rhel9 Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-console-plugin-rhel9, openshift-lightspeed/lightspeed-console-plugin-419-rhel9, openshift-lightspeed/lightspeed-console-plugin-pf5-rhel9 Red Hat OpenShift Pipelines openshift-pipelines/pipelines-hub-ui-rhel8, openshift-pipelines/pipelines-hub-ui-rhel9, openshift-pipelines/pipelines-console-plugin-rhel8, openshift-pipelines/pipelines-console-plugin-rhel9, openshift-pipelines/pipelines-console-plugin-pf5-rhel9
    affected: workaround, no fix available
  • Red Hat Ansible Automation Platform 2 automation-controller, ansible-automation-platform-24/lightspeed-rhel8, ansible-automation-platform-25/lightspeed-rhel8, ansible-automation-platform-26/lightspeed-rhel9, ansible-automation-platform-27/lightspeed-rhel9
    affected: workaround, no fix planned “Will not fix”
  • Red Hat build of Apache Camel - HawtIO 4 ws Red Hat Build of Podman Desktop rh-podman-desktop.git
    affected: workaround, no fix available
  • Red Hat Build of Podman Desktop - Tech Preview rhdesktop/rh-podman-desktop-ext-rhel-rhel10, rhdesktop/rh-podman-desktop-ext-bootc-rhel10, rhdesktop/rh-podman-desktop-ext-sandbox-rhel10
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Connectivity Link 1 rhcl-1/rhcl-console-plugin-rhel9 Red Hat Enterprise Linux 9 librbd1, librados2
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AI (RHEL AI) 3 rust, thrift, rhelai3/bootc-cuda-rhel9, rhelai3/bootc-rocm-rhel9, rhelai3/bootc-gaudi-rhel9, rhelai3/disk-image-cuda-rhel9 Red Hat Fuse 7 ws
    affected: workaround, no fix planned “Will not fix”
  • Red Hat OpenShift Container Platform 4 openshift4/ose-agent-installer-ui-rhel9 Red Hat OpenShift Container Platform 5 openshift5/ose-monitoring-plugin-rhel9
    affected: workaround, no fix available
  • Red Hat Quay 3 quay/quay-rhel8
    affected: workaround, no fix planned “Will not fix”
show 25 more
  • Red Hat Satellite 6 satellite/iop-vulnerability-frontend-rhel9 Red Hat Self-service automation portal 2 ansible-automation-platform/automation-portal, ansible-automation-platform/bootc-automation-portal-rhel9
    affected: workaround, no fix available
  • Red Hat Cluster Observability Operator 1.5 cluster-observability-operator/logging-console-plugin-rhel9 1782841925, cluster-observability-operator/monitoring-console-plugin-rhel9 1782838476, cluster-observability-operator/logging-console-plugin-pf4-rhel9 1782839279, cluster-observability-operator/logging-console-plugin-pf5-rhel9 1782840539, cluster-observability-operator/monitoring-console-plugin-pf5-rhel9 1782844225, cluster-observability-operator/monitoring-console-plugin-pf6-rhel9 1782839658, +6 more
    fixed: vendor fix RHSA-2026:34342
  • Red Hat Cryostat 4 on RHEL 9 cryostat/cryostat-openshift-console-plugin-rhel9 4.2.0-13
    fixed: vendor fix RHSA-2026:48151
  • Red Hat AMQ Broker 7.13.6
    fixed: vendor fix RHSA-2026:66545
  • Red Hat AMQ Broker 7.14.1
    fixed: vendor fix RHSA-2026:66488
  • Red Hat Developer Hub 1.9 rhdh/rhdh-hub-rhel9 1782761244
    fixed: vendor fix RHSA-2026:33574
  • Red Hat Developer Hub 1.10 rhdh/rhdh-hub-rhel9 1783448184
    fixed: vendor fix RHSA-2026:36754
  • Red Hat Discovery 2 discovery/discovery-ui-rhel9 1782166952
    fixed: vendor fix RHSA-2026:29197
  • Red Hat Enterprise Linux Extensions Channel (v. 10) rh-podman-desktop 1.1.2-1.el10_2
    fixed: vendor fix RHSA-2026:57590
  • Red Hat Migration Toolkit 1.8 rhmtc/openshift-migration-ui-rhel8 1783690532
    fixed: vendor fix RHSA-2026:41928
  • Red Hat OpenShift AI 2.25 rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9 1787801527
    fixed: vendor fix RHSA-2026:65126
  • Red Hat OpenShift AI 3.3 rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9 1790013905
    fixed: vendor fix RHSA-2026:73987
  • Red Hat OpenShift AI 3.4 rhoai/odh-dashboard-rhel9 1787347991, rhoai/odh-mod-arch-maas-rhel9 1787251250, rhoai/odh-mod-arch-automl-rhel9 1787250508, rhoai/odh-mod-arch-gen-ai-rhel9 1786611759, rhoai/odh-mod-arch-autorag-rhel9 1787251550, rhoai/odh-mod-arch-eval-hub-rhel9 1791861214, +2 more
    fixed: vendor fix RHSA-2026:60520
  • Red Hat Openshift Data Foundation 4.18 odf4/cephcsi-rhel9 1783676191, odf4/cephcsi-rhel9 1786705347, odf4/odf-cli-rhel9 1784094299, odf4/odf-cli-rhel9 1786705938, odf4/mcg-core-rhel9 1784094353, odf4/mcg-core-rhel9 1786705558, +32 more
    fixed: vendor fix RHSA-2026:56431
  • Red Hat Openshift Data Foundation 4.19 odf4/cephcsi-rhel9 1783684360, odf4/cephcsi-rhel9 1786701839, odf4/odf-cli-rhel9 1784054873, odf4/odf-cli-rhel9 1786702440, odf4/mcg-core-rhel9 1784054582, odf4/mcg-core-rhel9 1786702052, +34 more
    fixed: vendor fix RHSA-2026:41944
  • Red Hat Openshift Data Foundation 4.20 odf4/cephcsi-rhel9 1783667125, odf4/cephcsi-rhel9 1786627460, odf4/odf-cli-rhel9 1784055020, odf4/odf-cli-rhel9 1786628142, odf4/mcg-core-rhel9 1784054598, odf4/mcg-core-rhel9 1786628235, +38 more
    fixed: vendor fix RHSA-2026:57013
  • Red Hat OpenShift Dev Spaces 3.29 devspaces/code-rhel9 1782498475, devspaces/dashboard-rhel9 1782498792
    fixed: vendor fix RHSA-2026:36820
  • Red Hat OpenShift Service Mesh 2.6 openshift-service-mesh/kiali-rhel8 1782287580, openshift-service-mesh/kiali-ossmc-rhel8 1781937133
    fixed: vendor fix RHSA-2026:33155
  • Red Hat OpenShift Service Mesh 3.0 openshift-service-mesh/kiali-rhel9 1782201833, openshift-service-mesh/kiali-ossmc-rhel9 1782201894
    fixed: vendor fix RHSA-2026:33160
  • Red Hat OpenShift Service Mesh 3.1 openshift-service-mesh/kiali-rhel9 1782201537, openshift-service-mesh/kiali-ossmc-rhel9 1782201696
    fixed: vendor fix RHSA-2026:33163
  • Red Hat OpenShift Service Mesh 3.2 openshift-service-mesh/kiali-rhel9 1782201812, openshift-service-mesh/kiali-ossmc-rhel9 1782201851
    fixed: vendor fix RHSA-2026:33173
  • Red Hat OpenShift Service Mesh 3.3 openshift-service-mesh/kiali-rhel9 1782201466, openshift-service-mesh/kiali-ossmc-rhel9 1782231869
    fixed: vendor fix RHSA-2026:33183
  • Red Hat Trusted Artifact Signer 1.3 rhtas/rekor-search-ui-rhel9 1789725818
    fixed: vendor fix RHSA-2026:70829
  • Red Hat Trusted Artifact Signer 1.4 rhtas/rekor-search-ui-rhel9 1783327185
    fixed: vendor fix RHSA-2026:37272
  • Red Hat Cluster Observability Operator 1.5 cluster-observability-operator/perses-rhel9 1782839109, cluster-observability-operator/thanos-rhel9 1782840280, cluster-observability-operator/korrel8r-rhel9 1782839157, cluster-observability-operator/prometheus-rhel9 1782840780, cluster-observability-operator/alertmanager-rhel9 1782840761, cluster-observability-operator/perses-rhel9-operator 1782839191, +7 more
    not affected: vulnerable code not present

32 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

1.43% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4p referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm ws
>=1.1.0, <5.2.5
>=6.0.0, <6.2.4
>=7.0.0, <7.5.11
>=8.0.0, <8.21.0
5.2.5
6.2.4
7.5.11
8.21.0

Affected products

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

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-770 Allocation of Resources Without Limits or Throttling
  • CWE-1050 Excessive Platform Resource Consumption within a Loop
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.