CVE-2019-20149
CVSS v3
7.5
HIGH
EPSS Score
2.3 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2019-12-30
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 2026-09-25, 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).
Is CVE-2019-20149 affecting your environment?
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