CVE-2021-43138
CVSS v3
7.8
HIGH
EPSS Score
3.3 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
In Async before 2.6.4 and 3.x before 3.2.2, a malicious user can obtain privileges via the mapValues() method, aka lib/internal/iterator.js createObjectIterator prototype pollution.
Technical details
- Published
- 2022-04-06
Frequently asked questions
What is CVE-2021-43138?
In Async before 2.6.4 and 3.x before 3.2.2, a malicious user can obtain privileges via the mapValues() method, aka lib/internal/iterator.js createObjectIterator prototype pollution.
Is CVE-2021-43138 actively exploited?
Active exploitation of CVE-2021-43138 has not been confirmed. Its EPSS score was 3.3% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-43138?
CVE-2021-43138 has a CVSS v3 base score of 7.8 (HIGH severity).
Is CVE-2021-43138 affecting your environment?
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