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Public proof of conceptFix available

CVE-2019-20149

A public proof of concept exists; no exploitation attested.

  • Published2019-12-30
  • Fixed in6.0.3
  • WeaknessCWE-668

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2019-12-3019:15CVE publishedNVD

Versions per branch

OSV · NVD
kind-of
BranchAffectedFixed in
6.0≥ 6.0.0, < 6.0.36.0.3
Kind-of project kind-of
BranchAffectedFixed in
6.0= 6.0.2no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • js-jqueryAzure Linux:3all versions · fixed in 3.5.0-4
  • js-jqueryAzure Linux:2all versions · fixed in 3.5.0-4
  • node-kind-ofUbuntu:18.04:LTSall versions · no fixed version listed
  • node-kind-ofDebian:14all versions · fixed in 6.0.3+dfsg-1
  • node-kind-ofDebian:13all versions · fixed in 6.0.3+dfsg-1
  • node-kind-ofDebian:12all versions · fixed in 6.0.3+dfsg-1

Vendor advisories

  • CVE-2019-20149 Red Hat Product Security2 products fixed · 28 known affected

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

    openshift-logging/kibana6-rhel8 as a component of Logging Subsystem for Red Hat OpenShift · servicemesh-grafana as a component of OpenShift Service Mesh 2.0 · servicemesh-grafana-prometheus as a component of OpenShift Service Mesh 2.0 · +25 more

  • RHSA-2021:3454 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: Red Hat Advanced Cluster Management 2.3.2 security and bug fix update

Full record on NVD

Fix

  1. Update kind-of to 6.0.3
  2. Vendor fix Red Hat Product Security RHSA-2021:3454 · 2 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.3/html-single/install/index#instal…
  3. No fix available, says the vendor Red Hat Product Security CVE-2019-20149 · 7 productsFix deferred
  4. No fix available, says the vendor Red Hat Product Security CVE-2019-20149 · 6 productsAffected
  5. No fix planned, says the vendor Red Hat Product Security CVE-2019-20149 · 4 productsOut of support scope
  6. No fix planned, says the vendor Red Hat Product Security CVE-2019-20149 · 11 productsWill not fix

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published
2019-12-30
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-6c8f-qphg-qjgp

Frequently asked questions

What is CVE-2019-20149?

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.

Is CVE-2019-20149 actively exploited?

Active exploitation of CVE-2019-20149 has not been confirmed. Its EPSS score was 2.3% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-20149?

CVE-2019-20149 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

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Sources for this record