CVE-2021-43138: Async Project Async

High severity, CVSS 7.8. EPSS: 3.3% chance of exploitation in the next 30 days.

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.

Affected products

• Async Project Async: before 2.6.4 (fixed in 2.6.4); from 3.0.0, before 3.2.2 (fixed in 3.2.2)
• Fedoraproject Fedora: version 36 only; version 37 only

Published 2022-04-06. Last modified 2026-06-17.