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Fencer Vulns
high 7.5

CVE-2021-3807 json

Inefficient Regular Expression Complexity in chalk/ansi-regex

published 2021-09-17 5 y ago modified 2026-10-08 31 d ago also GHSA-93q8-gq69-wqmw , EUVD-2021-2021

cvss
7.5
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.6%
EPSS 3.6% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

ansi-regex is vulnerable to Inefficient Regular Expression Complexity

Patch / fix

  • npm ansi-regex 3.0.1, 4.1.1, 5.0.1, 6.0.1
  • chalk chalk/ansi-regex 5.0.1, 6.0.1
  • node-ansi-regex Debian 14, Debian 13, Debian 12 5.0.1-1

debian advisories DEBIAN-CVE-2021-3807

  • npm RHEL 8 1:8.11.0-1.16.16.0.3.module+el8.6.0+16248+76b0e185
  • nodejs RHEL 8 1:16.16.0-3.module+el8.6.0+16248+76b0e185
  • nodejs-nodemon RHEL 8 2.0.19-2.module+el8.6.0+16240+7ca51420
  • nodejs-full-i18n RHEL 8 1:16.16.0-3.module+el8.6.0+16248+76b0e185
  • nodejs-packaging RHEL 8 25-1.module+el8.5.0+10992+fac5fe06
  • npm RHEL 8 1:6.14.15-1.14.18.2.2.module+el8.5.0+13644+8d46dafd
  • nodejs RHEL 8 1:14.18.2-2.module+el8.5.0+13644+8d46dafd
  • nodejs-nodemon RHEL 8 2.0.15-1.module+el8.5.0+13504+a2e74d91

red hat advisories RHSA-2022:6449RHSA-2022:0350RHSA-2021:5171RHSA-2022:0246RHSA-2022:0041RHSA-2022:5555

  • 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
  • nodejs14 openSUSE Leap 15.3 14.19.0-15.27.1
  • nodejs8 openSUSE Leap 15.3 8.17.0-10.19.2
  • nodejs12 openSUSE Leap 15.3 12.22.10-4.29.3

opensuse advisories openSUSE-SU-2024:12723-1openSUSE-SU-2022:0715-1openSUSE-SU-2022:0704-1openSUSE-SU-2022:0657-1

  • nodejs AlmaLinux 9 1:16.16.0-1.el9_0
  • nodejs-nodemon AlmaLinux 9 2.0.19-1.el9_0
  • npm AlmaLinux 9 1:8.11.0-1.16.16.0.1.el9_0
  • nodejs-libs AlmaLinux 9 1:16.16.0-1.el9_0
  • nodejs-full-i18n AlmaLinux 9 1:16.16.0-1.el9_0
  • npm AlmaLinux 8 1:6.14.15-1.14.18.2.2.module_el8.5.0+2618+8d46dafd
  • npm AlmaLinux 8 1:6.14.15-1.14.18.2.2.module_el8.5.0+254+b4526b16
  • nodejs AlmaLinux 8 1:14.18.2-2.module_el8.5.0+2618+8d46dafd

almalinux advisories ALSA-2022:6595ALSA-2022:0350ALSA-2021:5171

  • nodejs-nodemon Rocky Linux 9 2.0.19-1.el9_0
  • nodejs Rocky Linux 8 1:16.16.0-3.module+el8.6.0+1003+ae94235a
  • nodejs-nodemon Rocky Linux 8 2.0.19-2.module+el8.6.0+1046+80feca58
  • nodejs-nodemon Rocky Linux 8 2.0.19-2.module+el8.6.0+1003+ae94235a
  • nodejs-packaging Rocky Linux 8 25-1.module+el8.6.0+1046+80feca58
  • nodejs-packaging Rocky Linux 8 25-1.module+el8.5.0+702+221f14e6
  • nodejs Rocky Linux 8 1:14.18.2-2.module+el8.5.0+733+de4fee6c
  • nodejs-nodemon Rocky Linux 8 2.0.15-1.module+el8.5.0+721+4c107270

rocky linux advisories RLSA-2022:6595RLSA-2022:6449RLSA-2022:0350RLSA-2021:5171

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-2021-3807 updated cvss 7.5

nodejs-ansi-regex: Regular expression denial of service (ReDoS) matching ANSI escape codes

  • Red Hat Migration Toolkit for Virtualization migration-toolkit-virtualization/mtv-ui-rhel8
    affected: no fix available “Fix deferred”
  • Red Hat OpenShift Service Mesh 1 kiali, servicemesh-grafana, servicemesh-prometheus, servicemesh-grafana-prometheus
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Service Mesh 2.0 servicemesh-grafana, servicemesh-prometheus, servicemesh-grafana-prometheus
    affected: no fix available
  • Red Hat A-MQ Online io.enmasse-enmasse
    affected: no fix planned “Out of support scope”
  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/grc-ui-rhel8, rhacm2/console-rhel8, rhacm2/console-ui-rhel8, rhacm2/grc-ui-api-rhel8, rhacm2/search-api-rhel8, rhacm2/console-api-rhel8, +4 more
    affected: no fix available “Fix deferred”
  • Red Hat build of Apicurio Registry 2 io.apicurio-apicurio-registry
    affected: no fix available
  • Red Hat Ceph Storage 3 grafana Red Hat Ceph Storage 4 ceph, librbd1, librgw2, rbd-nbd, ceph-mds, ceph-mgr, +29 more
    affected: no fix planned “Out of support scope”
  • Red Hat Ceph Storage 5 ceph, cephadm, librbd1, librgw2, rbd-nbd, ceph-mds, +33 more Red Hat Enterprise Linux 8 npm, nodejs, nodejs-libs, nodejs-nodemon, nodejs-full-i18n, nodejs-packaging, +1 more Red Hat Enterprise Linux 9 npm, nodejs, nodejs-libs, nodejs-full-i18n
    affected: no fix available
show 17 more
  • Red Hat JBoss Data Grid 7 org.jboss.hal-hal-parent, org.infinispan-infinispan-parent, org.infinispan-infinispan-management-console Red Hat JBoss Enterprise Application Platform 6 org.keycloak-keycloak-parent Red Hat OpenShift Container Platform 3.11 kibana
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Container Platform 4 openshift4/ose-console, openshift4/ose-grafana, openshift4/ose-thanos-rhel9, openshift4/ose-metering-hadoop, openshift4/ose-prometheus-rhel9
    affected: no fix planned “Will not fix”
  • Red Hat Openshift Container Storage 4 ocs4/mcg-core-rhel8
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift GitOps openshift-gitops-1/argocd-rhel8 Red Hat Quay 3 quay/quay-rhel8
    affected: no fix planned “Will not fix”
  • Red Hat Satellite 6 tfm-rubygem-rabl
    affected: no fix available “Fix deferred”
  • Red Hat Software Collections rh-nodejs12-npm, rh-nodejs12-nodejs, rh-nodejs12-nodejs-nodemon
    affected: no fix planned “Out of support scope”
  • Red Hat Virtualization 4 cockpit-ovirt-uiplugin, cockpit-ovirt-dashboard
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) nodejs 14.18.2-2.module+el8.5.0+13644+8d46dafd, nodejs 16.16.0-3.module+el8.6.0+16248+76b0e185, nodejs-packaging 23-3.module+el8.3.0+6519+9f98ed83, nodejs-packaging 25-1.module+el8.5.0+10992+fac5fe06, npm 8.11.0-1.16.16.0.3.module+el8.6.0+16248+76b0e185, nodejs-nodemon 2.0.15-1.module+el8.5.0+13504+a2e74d91, +5 more
    fixed: vendor fix RHSA-2022:0350
  • Red Hat Enterprise Linux AppStream (v. 9) nodejs-nodemon 2.0.19-1.el9_0
    fixed: vendor fix RHSA-2022:6595
  • Red Hat Enterprise Linux AppStream EUS (v.8.4) nodejs 14.18.2-2.module+el8.4.0+13643+6c0ebf22, nodejs-packaging 23-3.module+el8.3.0+6519+9f98ed83, nodejs-nodemon 2.0.15-1.module+el8.4.0+13503+fc29810b, npm 6.14.15-1.14.18.2.2.module+el8.4.0+13643+6c0ebf22, nodejs-full-i18n 14.18.2-2.module+el8.4.0+13643+6c0ebf22
    fixed: vendor fix RHSA-2022:0246
  • Red Hat Fuse 7.11
    fixed: vendor fix RHSA-2022:5532
  • Red Hat Migration Toolkit 1.6 rhmtc/openshift-migration-ui-rhel8 v1.6.5-8
    fixed: vendor fix RHSA-2022:4814
  • Red Hat Migration Toolkit 1.7 rhmtc/openshift-migration-ui-rhel8 v1.7.2-9
    fixed: vendor fix RHSA-2022:5483
  • Red Hat Software Collections for RHEL Workstation(v. 7) rh-nodejs14-nodejs 14.18.2-1.el7, rh-nodejs14-npm 6.14.15-14.18.2.1.el7, rh-nodejs14-nodejs-nodemon 2.0.3-6.el7 Red Hat Software Collections for RHEL(v. 7) rh-nodejs14-nodejs 14.18.2-1.el7, rh-nodejs14-npm 6.14.15-14.18.2.1.el7, rh-nodejs14-nodejs-nodemon 2.0.3-6.el7
    fixed: vendor fix RHSA-2022:0041
  • Red Hat RHEL-8-RHEV-S-4.4 - Red Hat Virtualization Engine 4.4 ovirt-web-ui 1.9.0-1.el8ev, ovirt-engine-ui-extensions 1.3.3-1.el8ev
    fixed: vendor fix RHSA-2022:4711
  • Red Hat RHODF 4.13 for RHEL 9 odf4/mcg-core-rhel9 v4.13.0-41
    fixed: vendor fix RHSA-2023:3742
  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/search-ui-rhel8, rhacm2/kui-web-terminal-rhel8 Red Hat Ansible Automation Platform 1.2 ansi-regex Red Hat Data Grid 8 org.infinispan-infinispan-console, org.infinispan-infinispan-js-client Red Hat Decision Manager 7 org.uberfire-uberfire-parent, org.kie.workbench-kie-wb-common, org.drools-droolsjbpm-integration, org.optaweb.vehiclerouting-optaweb-vehicle-routing, org.optaweb.employeerostering-optaweb-employee-rostering Red Hat Enterprise Linux AppStream (v. 8) nodejs 16.13.1-3.module+el8.5.0+13548+45d748af, nodejs-packaging 25-1.module+el8.5.0+10992+fac5fe06, npm 8.1.2-1.16.13.1.3.module+el8.5.0+13548+45d748af, nodejs-full-i18n 16.13.1-3.module+el8.5.0+13548+45d748af Red Hat Enterprise Linux AppStream (v. 9) nodejs 16.16.0-1.el9_0, nodejs-libs 16.16.0-1.el9_0, npm 8.11.0-1.16.16.0.1.el9_0, nodejs-full-i18n 16.16.0-1.el9_0
    +3 more products
    Red Hat Fuse 7 io.apicurio-apicurito, io.syndesis-syndesis-ui Red Hat Integration Camel K 1 io.apicurio-apicurio-registry Red Hat Integration Camel Quarkus 1 io.apicurio-apicurio-registry
    not affected: vulnerable code not present

8 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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
31 d ago

Exploit prediction

3.55% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • huntr.dev https://huntr.dev/bounties/5b3cf33b-ede0-4398-9974-800876dfd994 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm ansi-regex
>=6.0.0, <6.0.1
>=5.0.0, <5.0.1
>=4.0.0, <4.1.1
>=3.0.0, <3.0.1
6.0.1
5.0.1
4.1.1
3.0.1

Affected products

  • chalk chalk/ansi-regex

Classification

Weakness
  • CWE-1333 Inefficient Regular Expression Complexity
  • CWE-697 Incorrect Comparison

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.