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Fencer Vulns
high 7.5

CVE-2019-20149 json

Validation Bypass in kind-of

published 2019-12-30 6 y ago modified 2026-06-17 4 mo ago also GHSA-6c8f-qphg-qjgp , EUVD-2020-0335

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.3%
EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits
0
none known

Summary

ctorName in index.js in kind-of v6.0.2 allows external user input to overwrite certain internal attributes via a conflicting name, as demonstrated by 'constructor': {'name':'Symbol'}. Hence, a crafted payload can overwrite this builtin attribute to manipulate the type detection result.

Patch / fix

  • npm kind-of 6.0.3
  • node-kind-of Debian 14, Debian 13, Debian 12 6.0.3+dfsg-1

debian advisories DEBIAN-CVE-2019-20149

  • js-jquery CBL-Mariner 2.0, Azure Linux 3.0 3.5.0-4

azure linux advisories AZL-44298AZL-47271

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2019-20149 updated cvss 5.9

nodejs-kind-of: ctorName in index.js allows external user input to overwrite certain internal attributes

  • Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/kibana6-rhel8
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Service Mesh 2.0 servicemesh-grafana, servicemesh-prometheus, servicemesh-grafana-prometheus
    affected: no fix available
  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/console-rhel8, rhacm2/search-ui-rhel8, rhacm2/console-ui-rhel8, rhacm2/search-api-rhel8, rhacm2/mcm-topology-rhel8, rhacm2/console-header-rhel8, +1 more
    affected: no fix available, no fix planned “Will not fix”
  • Red Hat Advanced Cluster Security 3 advanced-cluster-security/rhacs-main-rhel8 Red Hat Ansible Automation Platform 1.2 kind-of
    affected: no fix available “Fix deferred”
  • Red Hat Ceph Storage 4 rhceph/rhceph-4-dashboard-rhel8
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 8 nodejs-nodemon
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Container Platform 3.11 kibana
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Container Platform 4 openshift4/ose-grafana, openshift4/ose-thanos-rhel9, openshift4/ose-logging-kibana6, openshift4/ose-prometheus-rhel9
    affected: no fix planned “Out of support scope”
show 5 more
  • Red Hat Openshift Data Foundation 4 odf4/odf-console-rhel9 Red Hat OpenShift distributed tracing 2 rhosdt/jaeger-all-in-one-rhel8
    affected: no fix available “Fix deferred”
  • Red Hat Quay 3 quay/quay-rhel8
    affected: no fix available
  • Red Hat Software Collections rh-nodejs10-nodejs-nodemon
    affected: no fix planned “Out of support scope”
  • Red Hat Advanced Cluster Management for Kubernetes 2.3 for RHEL 8 rhacm2/kui-web-terminal-rhel8 v2.3.2-5
    fixed: vendor fix RHSA-2021:3454
  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/grc-ui-rhel8, rhacm2/grc-ui-api-rhel8, rhacm2/console-api-rhel8, rhacm2/application-ui-rhel8 Red Hat Advanced Cluster Management for Kubernetes 2.3 for RHEL 7 rhacm2/thanos-rhel7 v2.3.2-3, rhacm2/management-ingress-rhel7 v2.3.2-3, rhacm2/memcached-exporter-rhel7 v2.3.2-2 Red Hat Advanced Cluster Management for Kubernetes 2.3 for RHEL 8 rhacm2/work-rhel8 v2.3.2-3, rhacm2/grc-ui-rhel8 v2.3.2-4, rhacm2/search-rhel8 v2.3.2-3, rhacm2/console-rhel8 v2.3.2-5, rhacm2/memcached-rhel8 v2.3.2-2, rhacm2/placement-rhel8 v2.3.2-3, +54 more Red Hat Openshift Data Foundation 4 odf4/mcg-core-rhel8 Red Hat Virtualization 4 ovirt-web-ui, cockpit-ovirt-uiplugin, cockpit-ovirt-dashboard, ovirt-engine-ui-extensions
    not affected: vulnerable code not present

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

Exploit prediction

2.34% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/jonschlinkert/kind-of/issues/30 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
npm kind-of
>=6.0.0, <6.0.3
6.0.3

Classification

Weakness
  • CWE-668 Exposure of Resource to Wrong Sphere

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.