CVE-2019-20149

Name: CVE-2019-20149
Creator: NVD / NIST
Published: 2019-12-30T19:15:11.91+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.28%

Last modified Jun 17, 2026

CVE-2019-20149 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 2.28% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

2.28%

80.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-668

Affected Software

Vendor	Product	Versions
Kind-Of Project	Kind-Of	6.0.2

References

https://github.com/jonschlinkert/kind-of/issues/30Exploit, Issue Tracking, Third Party Advisory
https://github.com/jonschlinkert/kind-of/pull/31Patch, Third Party Advisory
https://github.com/jonschlinkert/kind-of/issues/30Exploit, Issue Tracking, Third Party Advisory
https://github.com/jonschlinkert/kind-of/pull/31Patch, Third Party Advisory

Timeline

Published: Dec 30, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-20149?

How severe is CVE-2019-20149?

CVE-2019-20149 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.28% probability of exploitation in the next 30 days.

How do I fix CVE-2019-20149?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-20149?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST