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No exploitation reportedFix available

CVE-2021-43138

No exploitation reported by the sources we read.

  • Published2022-04-06
  • Fixed in3.2.2 · 2.6.4
  • WeaknessCWE-1321

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2022-04-0617:15CVE publishedNVD

Versions per branch

NVD · OSV
Async project async
BranchAffectedFixed in
3.x≥ 3.0.0, < 3.2.23.2.2
2.6< 2.6.42.6.4
2.x≥ 2.0.0, < 2.6.42.6.4
Fedoraproject fedora
BranchAffectedFixed in
36.x= 36no fix published
37.x= 37no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • @rootio/asyncRoot:npmall versions · fixed in 2.6.3-root.io.1
  • @rootio/asyncRoot:npmall versions · fixed in 3.2.0-root.io.1
  • ansibleSUSE:Manager Client Tools 15-BETAall versions · fixed in 2.9.27-159000.3.9.1
  • asyncTuxCare:npmfrom 2.6.1-tuxcare.0 · fixed in 2.6.1-tuxcare.1
  • asyncTuxCare:npmfrom 2.6.3-tuxcare.0 · fixed in 2.6.3-tuxcare.1
  • asyncTuxCare:npmfrom 3.2.0-tuxcare.0 · fixed in 3.2.0-tuxcare.1
  • asyncRoot:npmall versions · fixed in 2.6.3-aikido.1
  • asyncRoot:npmall versions · fixed in 3.2.0-aikido.1

139 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-43138 Red Hat Product Security4 products fixed · 61 known affected

    async: Prototype Pollution in async

    migration-toolkit-virtualization/mtv-ui-rhel8 as a component of Migration Toolkit for Virtualization · odo.src as a component of OpenShift Developer Tools and Services · openshift-pipelines/pipelines-hub-api-rhel8 as a component of OpenShift Pipelines · +58 more

  • RHSA-2023:3645 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Service Mesh 2.2.7 security update

  • RHSA-2023:0693 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Migration Toolkit for Containers (MTC) 1.7.7 security and bug fix update

Full record on NVD

Fix

  1. Update Async project async to 3.2.2 · 2.6.4
  2. Vendor fix Red Hat Product Security RHSA-2023:3645 · 3 productsFor details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  3. Vendor fix Red Hat Product Security RHSA-2023:0693 · 1 productFor details on how to install and use MTC, refer to: https://docs.openshift.com/container-platform/latest/migration_toolkit_for_containers/installing-mtc.html
  4. No fix available, says the vendor Red Hat Product Security CVE-2021-43138 · 1 productFix deferred
  5. No fix available, says the vendor Red Hat Product Security CVE-2021-43138 · 10 productsAffected
  6. No fix planned, says the vendor Red Hat Product Security CVE-2021-43138 · 9 productsOut of support scope
  7. No fix planned, says the vendor Red Hat Product Security CVE-2021-43138 · 41 productsWill not fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.17.8read 2026-10-23
  • NVDCVSS 2.06.8read 2026-10-23
  • NVDweakness (CWE)CWE-1321read 2026-10-23
  • FIRST EPSSEPSS score3.3 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2022-04-07

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2022-04-06
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-fwr7-v2mv-hh25

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 2026-11-08, 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), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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