CVE-2021-3645
CVSS v3
9.8
CRITICAL
EPSS Score
1.4 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
merge is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Technical details
- Published
- 2021-09-10
Frequently asked questions
What is CVE-2021-3645?
merge is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Is CVE-2021-3645 actively exploited?
Active exploitation of CVE-2021-3645 has not been confirmed. Its EPSS score was 1.4% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-3645?
CVE-2021-3645 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-3645 affecting your environment?
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