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Fencer Vulns
high 7.5

CVE-2026-45736 json

ws: Uninitialized memory disclosure

published 2026-05-15 5 mo ago modified 2026-10-26 14 d ago also EUVD-2026-30543 , GHSA-58qx-3vcg-4xpx

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 55%
public exploits
0
none known

Summary

ws is an open source WebSocket client and server for Node.js. Prior to 8.20.1, the websocket.close() implementation is vulnerable to uninitialized memory disclosure when a TypedArray is passed as the reason argument. This vulnerability is fixed in 8.20.1.

Patch / fix

  • npm ws 8.20.1
  • 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 Red Hat Ansible Automation Platform 2.6 1782761510
  • 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 Hardened Images 1.22.22-18.1.hum1, 8.0.128-1.hum1, 9.0.118-1.hum1, 10.0.109-1.hum1
  • 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 Container Platform 4.19 1784670101
  • Red Hat Red Hat OpenShift Container Platform 4.20 1784724699, 1784730857
  • Red Hat Red Hat OpenShift Container Platform 4.21 1784127553, 1784713741
  • Red Hat Red Hat OpenShift Container Platform 4.22 1784144936, 1785230147
  • Red Hat Red Hat Openshift Data Foundation 4.18 1786705347, 1786705558, 1786705646, 1786705741, 1786705777, 1786705802, 1786705938, 1786706101, 1786706125, 1786706138, 1786706177, 1786706188, 1786706357, 1786706577, 1786706612, 1786706644, 1786706659, 1786706679, 1786706880
  • Red Hat Red Hat Openshift Data Foundation 4.19 1786701555, 1786701839, 1786702052, 1786702264, 1786702276, 1786702315, 1786702440, 1786702448, 1786702559, 1786702563, 1786702623, 1786702636, 1786702713, 1786702716, 1786702872, 1786702917, 1786702949, 1786703071, 1786703137, 1786703143
  • Red Hat Red Hat Openshift Data Foundation 4.20 1786626399, 1786627106, 1786627382, 1786627430, 1786627460, 1786627469, 1786627559, 1786628053, 1786628142, 1786628235, 1786628340, 1786628623, 1786629076, 1786629478, 1786629761, 1786631508, 1786632256, 1786644072, 1786687918, 1786688215
  • Red Hat Red Hat Openshift Data Foundation 4.22 1787057250, 1787057603, 1787057849, 1787057964, 1787057989, 1787058278, 1787058403, 1787058450, 1787058588, 1787058658, 1787058706, 1787058807, 1787058970, 1787059072, 1787059085, 1787059538, 1787059616, 1787059853, 1787060257, 1787061098
  • Red Hat Red Hat OpenShift Dev Spaces 3.29 1782498475, 1782498792
  • Red Hat Red Hat Trusted Artifact Signer 1.4 1783327185
  • node-ws Debian 14 8.20.1+~cs14.19.1-1

debian advisories DEBIAN-CVE-2026-45736

  • rh-podman-desktop RHEL 10.2 1.1.2-1.el10_2
  • dotnet9.0 hummingbird 1 9.0.118-1.hum1
  • dotnet-sdk-9.0 hummingbird 1 9.0.118-1.hum1
  • dotnet-sdk-aot-9.0 hummingbird 1 9.0.118-1.hum1
  • dotnet-sdk-dbg-9.0 hummingbird 1 9.0.118-1.hum1
  • dotnet-templates-9.0 hummingbird 1 9.0.118-1.hum1
  • netstandard-targeting-pack-2.1 hummingbird 1 9.0.118-1.hum1
  • dotnet-sdk-9.0-source-built-artifacts hummingbird 1 9.0.118-1.hum1

red hat advisories RHSA-2026:57590RHSA-2026:27171RHSA-2026:26994RHSA-2026:26638RHSA-2026:7655

  • zcode openSUSE Tumbleweed 3.14.3-1.1
  • kimi-code openSUSE Leap 16.0 0.42.0-bp160.1.1
  • kimi-code openSUSE Tumbleweed 0.41.0-1.1

opensuse advisories openSUSE-SU-2026:11952-1openSUSE-SU-2026:21849-1openSUSE-SU-2026:11705-1

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-2026-45736 updated cvss 7.5

ws: ws: Uninitialized memory disclosure via `websocket.close()` with `TypedArray`

  • 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
    affected: no fix available
  • 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: no fix available, no fix planned “Will not fix”
  • Red Hat Ansible Automation Platform 2 automation-controller, automation-eda-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: 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: 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: no fix planned “Will not fix”
  • Red Hat Connectivity Link 1 rhcl-1/rhcl-console-plugin-rhel9
    affected: no fix available
  • Red Hat Data Grid 8 ws
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 9 librbd1, librados2
    affected: no fix available
show 29 more
  • 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
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Container Platform 5 openshift5/ose-monitoring-plugin-rhel9
    affected: no fix available
  • Red Hat Quay 3 quay/quay-rhel8
    affected: no fix planned “Will not fix”
  • 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: no fix available
  • 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 Ansible Automation Platform 2.6 ansible-automation-platform-26/gateway-rhel9 1782761510
    fixed: vendor fix RHSA-2026:34374
  • 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 Hardened Images dotnet8.0 8.0.128-1.hum1, dotnet9.0 9.0.118-1.hum1, yarnpkg 1.22.22-18.1.hum1, dotnet10.0 10.0.109-1.hum1, dotnet-sdk-8.0 8.0.128-1.hum1, dotnet-sdk-9.0 9.0.118-1.hum1, +13 more
    fixed: vendor fix RHSA-2026:26638
  • 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 Container Platform 4.19 openshift4/ose-monitoring-plugin-rhel9 1784670101
    fixed: vendor fix RHSA-2026:44235
  • Red Hat OpenShift Container Platform 4.20 openshift4/ose-monitoring-plugin-rhel9 1784730857, openshift4/ose-agent-installer-ui-rhel9 1784724699
    fixed: vendor fix RHSA-2026:44263
  • Red Hat OpenShift Container Platform 4.21 openshift4/ose-monitoring-plugin-rhel9 1784127553, openshift4/ose-agent-installer-ui-rhel9 1784713741
    fixed: vendor fix RHSA-2026:44267
  • Red Hat OpenShift Container Platform 4.22 openshift4/ose-monitoring-plugin-rhel9 1784144936, openshift4/ose-agent-installer-ui-rhel9 1785230147
    fixed: vendor fix RHSA-2026:48693
  • Red Hat Openshift Data Foundation 4.18 odf4/cephcsi-rhel9 1786705347, odf4/odf-cli-rhel9 1786705938, odf4/mcg-core-rhel9 1786705558, odf4/odf-console-rhel9 1786706577, odf4/mcg-rhel9-operator 1786705646, odf4/ocs-rhel9-operator 1786705802, +13 more
    fixed: vendor fix RHSA-2026:56431
  • Red Hat Openshift Data Foundation 4.19 odf4/cephcsi-rhel9 1786701839, odf4/odf-cli-rhel9 1786702440, odf4/mcg-core-rhel9 1786702052, odf4/odf-console-rhel9 1786703071, odf4/mcg-rhel9-operator 1786702559, odf4/ocs-rhel9-operator 1786702276, +14 more
    fixed: vendor fix RHSA-2026:56366
  • Red Hat Openshift Data Foundation 4.20 odf4/cephcsi-rhel9 1786627460, odf4/odf-cli-rhel9 1786628142, odf4/mcg-core-rhel9 1786628235, odf4/odf-console-rhel9 1786628053, odf4/mcg-rhel9-operator 1786627106, odf4/ocs-rhel9-operator 1786629478, +16 more
    fixed: vendor fix RHSA-2026:57013
  • Red Hat Openshift Data Foundation 4.22 odf4/cephcsi-rhel9 1787057250, odf4/odf-cli-rhel9 1787058706, odf4/mcg-core-rhel9 1787058450, odf4/odf-drbd-rhel9 1787059538, odf4/odf-console-rhel9 1787059072, odf4/devicefinder-rhel9 1787057603, +22 more
    fixed: vendor fix RHSA-2026:56928
  • Red Hat OpenShift Dev Spaces 3.29 devspaces/code-rhel9 1782498475, devspaces/dashboard-rhel9 1782498792
    fixed: vendor fix RHSA-2026:36820
  • 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 Cryostat 4 ws, grafana-infinity-datasource-npm, cryostat-openshift-console-plugin-npm
    not affected: component not present

37 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
no
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.74% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/websockets/ws/security/advisories/GHSA-58qx-3vcg-4xpx referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 4.4 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub 3.1 4.4 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
npm ws
>=8.0.0, <8.20.1
8.20.1

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 Red Hat Ansible Automation Platform 2.6
  • 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 Hardened Images
  • 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 Container Platform 4.19
  • Red Hat Red Hat OpenShift Container Platform 4.20
  • Red Hat Red Hat OpenShift Container Platform 4.21
  • Red Hat Red Hat OpenShift Container Platform 4.22
  • 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 Data Foundation 4.22
  • Red Hat Red Hat OpenShift Dev Spaces 3.29
  • 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 2
  • 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 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-908 Use of Uninitialized Resource
  • CWE-824 Access of Uninitialized Pointer
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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.