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Fencer Vulns
high 7.8

CVE-2021-43138 json

Prototype Pollution in async

published 2022-04-06 4 y ago modified 2026-06-17 4 mo ago also GHSA-fwr7-v2mv-hh25 , EUVD-2022-1728

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm async 2.6.4, 3.2.2
  • async_project async 2.6.4, 3.2.2
  • grafana SLE Module for Package Hub 15 SP5, openSUSE Leap 15.5 9.5.8-150200.3.53.2
  • grafana Manager Client Tools 15 9.5.8-150000.1.60.2
  • spacecmd openSUSE Leap 15.5, Manager Client Tools 15 4.3.26-150000.3.113.1
  • mgr-daemon Manager Client Tools 15 4.3.8-150000.1.44.1
  • spacewalk-client-tools Manager Client Tools 15 4.3.18-150000.3.86.2
  • prometheus-postgres_exporter openSUSE Leap 15.5, Manager Client Tools 15 0.10.1-150000.1.17.1
  • uyuni-proxy-systemd-services Manager Client Tools for SLE Micro 5, Manager Client Tools 15 4.3.10-150000.1.15.1
  • golang-github-prometheus-prometheus Manager Client Tools 15 2.45.0-150000.3.53.1

suse advisories SUSE-RU-2024:0511-1SUSE-SU-2024:0487-1SUSE-SU-2024:0486-1SUSE-SU-2024:0196-1SUSE-SU-2024:0191-1SUSE-SU-2023:2579-1

  • grafana openSUSE Tumbleweed 9.3.6-1.1

opensuse advisories openSUSE-SU-2024:12723-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-43138 updated cvss 7.8

async: Prototype Pollution in async

  • Red Hat Migration Toolkit for Virtualization migration-toolkit-virtualization/mtv-ui-rhel8
    affected: no fix available “Fix deferred”
  • Red Hat OpenShift Developer Tools and Services odo Red Hat OpenShift Pipelines openshift-pipelines/pipelines-hub-ui-rhel8, openshift-pipelines/pipelines-hub-api-rhel8, openshift-pipelines/pipelines-hub-db-migration-rhel8 Red Hat OpenShift Service Mesh 2 openshift-service-mesh/kiali-rhel8
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Service Mesh 2.0 servicemesh-grafana, servicemesh-prometheus, servicemesh-grafana-prometheus, openshift-service-mesh/kiali-rhel8
    affected: no fix available
  • Red Hat OpenShift Service Mesh 2.1 servicemesh-grafana, servicemesh-prometheus, openshift-service-mesh/kiali-rhel8
    affected: no fix planned “Will not fix”
  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/application-ui-rhel8
    affected: no fix planned “Out of support scope”
  • Red Hat Ceph Storage 4 cockpit-ceph-installer
    affected: no fix planned “Will not fix”
  • Red Hat Decision Manager 7 async Red Hat Enterprise Linux 6 firefox Red Hat Enterprise Linux 7 firefox
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 pcs, grafana, pcs-snmp, grafana-loki, grafana-mssql, grafana-mysql, +10 more Red Hat Enterprise Linux 9 gjs, grafana, grafana-selinux Red Hat Fuse 7 async
    affected: no fix planned “Will not fix”
show 10 more
  • Red Hat Integration Service Registry async Red Hat JBoss Data Grid 7 async
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Container Platform 3.11 openshift3/ose-console
    affected: no fix planned “Will not fix”
  • Red Hat Openshift Container Storage 4 ocs4/mcg-core-rhel8
    affected: no fix available
  • Red Hat Openshift Data Foundation 4 odf4/mcg-core-rhel8, noobaa-core-container, odf4/odf-console-rhel9, odf4/odf-multicluster-console-rhel8
    affected: no fix available, no fix planned “Will not fix”
  • Red Hat OpenShift distributed tracing 2 rhosdt/jaeger-query-rhel8 Red Hat OpenShift GitOps openshift-gitops-1/argocd-rhel8
    affected: no fix planned “Will not fix”
  • Red Hat Process Automation 7 async
    affected: no fix planned “Out of support scope”
  • Red Hat Quay 3 quay/quay-rhel8
    affected: no fix available
  • Red Hat Migration Toolkit 1.7 rhmtc/openshift-migration-ui-rhel8 v1.7.7-3
    fixed: vendor fix RHSA-2023:0693
  • Red Hat RHOSSM 2.2 for RHEL 8 openshift-service-mesh/prometheus-rhel8 2.2.7-7
    fixed: vendor fix RHSA-2023:3645
  • Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/kibana6-rhel8 Red Hat A-MQ Online async Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/grc-ui-rhel8, rhacm2/console-rhel8, rhacm2/search-ui-rhel8, rhacm2/grc-ui-api-rhel8, rhacm2/search-api-rhel8, rhacm2/console-api-rhel8, +1 more Red Hat Ansible Automation Platform 2 aap-azure-ui Red Hat build of Apicurio Registry 2 async Red Hat Data Grid 8 async
    +9 more products
    Red Hat Enterprise Linux 8 mozjs60 Red Hat Enterprise Linux 9 polkit, polkit-libs Red Hat Integration Camel K 1 async Red Hat JBoss Enterprise Application Platform 7 async Red Hat JBoss Enterprise Application Platform Expansion Pack async Red Hat Migration Toolkit 1.7 rhmtc/openshift-velero-plugin-rhel8 v1.7.7-3, rhmtc/openshift-migration-velero-rhel8 v1.7.7-5, rhmtc/openshift-migration-openvpn-rhel8 v1.7.7-2, rhmtc/openshift-migration-registry-rhel8 v1.7.7-3, rhmtc/openshift-migration-rhel8-operator v1.7.7-9, rhmtc/openshift-migration-operator-bundle v1.7.7-9, +10 more Red Hat OpenShift Container Platform 4 openshift4/ose-console Red Hat OpenShift Dev Spaces devspaces-theia-endpoint-rhel8-container Red Hat OpenShift distributed tracing 2 rhosdt/jaeger-all-in-one-rhel8
    not affected: vulnerable code not present

1 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.35% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • jsfiddle.net https://jsfiddle.net/oz5twjd9/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P
GitHub 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
npm async
>=3.0.0, <3.2.2
>=2.0.0, <2.6.4
3.2.2
2.6.4

Classification

Weakness
  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.