CVE-2021-43138
HIGH
7.8
CVSS Score
Published: April 6, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 04:10 AM UTC
2 products affected across 2 vendorsFedoraAsync
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Severity
HIGH7.8
Exploit prediction
EPSS 3%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 2.6.43.0.0 ≤ v < 3.2.2
Affected range stops below 2.6.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.2.2, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://github.com/caolan/async/commit/e1ecdbf79264f9ab488c7799f4c76996d5dca66d
- https://github.com/caolan/async/compare/v2.6.3...v2.6.4
- https://github.com/caolan/async/pull/1828
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTEUUTNIEBHGKUKKLNUZSV7IEP6IP3Q3/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UM6XJ73Q3NAM5KSGCOKJ2ZIA6GUWUJLK/
References (10)
Third Party Advisory
Source: [email protected]
https://github.com/caolan/async/blob/master/lib/internal/iterator.jsThird Party Advisory
Source: [email protected]
https://github.com/caolan/async/blob/master/lib/mapValuesLimit.jsRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/caolan/async/blob/v2.6.4/CHANGELOG.md#v264PatchThird Party Advisory
Source: [email protected]
https://github.com/caolan/async/commit/e1ecdbf79264f9ab488c7799f4c76996d5dca66dPatchThird Party Advisory
Source: [email protected]
https://github.com/caolan/async/compare/v2.6.3...v2.6.4CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-1321
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