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CVE-2021-3807

27
FAUCET Score

CVE-2021-3807 describes an Inefficient Regular Expression Complexity vulnerability in the ansi-regex library, impacting various products including those from Oracle. This high-severity vulnerability (CVSS 7.5) can be exploited remotely with low complexity, potentially leading to a denial of service (availability impact). While no active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB) has been observed, and community discussion and media coverage are minimal, organizations using affected versions should still address this risk.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.0.0, < 4.1.1CPE matchmatch criteria
cpe:2.3:a:ansi-regex_project:ansi-regex:*:*:*:*:*:node.js:*:*
3.0.0CPE matchmatch criteria
cpe:2.3:a:ansi-regex_project:ansi-regex:3.0.0:*:*:*:*:node.js:*:*
5.0.0CPE matchmatch criteria
cpe:2.3:a:ansi-regex_project:ansi-regex:5.0.0:*:*:*:*:node.js:*:*
6.0.0CPE matchmatch criteria
cpe:2.3:a:ansi-regex_project:ansi-regex:6.0.0:*:*:*:*:node.js:*:*
1.15.0CPE matchmatch criteria
cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.15.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.55%
Probability of exploitation in next 30 days
EPSS Percentile
88.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0355 is in the 79th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (50)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: ansi-regexFixed in: 5.0.1
npmpatch availablevia ghsa
Product: ansi-regexFixed in: 4.1.1
npmpatch availablevia ghsa
Product: ansi-regexFixed in: 3.0.1
npmpatch availablevia ghsa
Product: ansi-regexFixed in: 6.0.1
oraclepatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-nodejs14-nodejs-0:14.18.2-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Migration Toolkit for Containers 1.7Fixed in: rhmtc/openshift-migration-ui-rhel8:v1.7.2-9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Migration Toolkit for Containers 1.6Fixed in: rhmtc/openshift-migration-ui-rhel8:v1.6.5-8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Fuse 7.11Fixed in: io.hawt-project
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Fuse 7.11Fixed in: io.hawt-hawtio-online
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: nodejs-nodemon-0:2.0.19-1.el9_0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: nodejs:16-8050020211206113934.c5368500
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: nodejs:16-8060020220805104227.ad008a3a
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: nodejs:14-8050020211213115342.c5368500
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: nodejs:14-8040020211213111158.522a0ee4
View patch
redhatpatch availablevia redhat_api
Product: RHODF-4.13-RHEL-9Fixed in: odf4/mcg-core-rhel9:v4.13.0-41
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization Engine 4.4Fixed in: ovirt-web-ui-0:1.9.0-1.el8ev
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization Engine 4.4Fixed in: ovirt-engine-ui-extensions-0:1.3.3-1.el8ev
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-nodejs14-nodejs-nodemon-0:2.0.3-6.el7
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/console-header-rhel8
redhatvendor investigatingvia redhat_api
Product: Red Hat Satellite 6Fixed in: tfm-rubygem-rabl
redhatvendor investigatingvia redhat_api
Product: Migration Toolkit for VirtualizationFixed in: migration-toolkit-virtualization/mtv-ui-rhel8
redhatvendor investigatingvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/console-ui-rhel8
redhatvendor investigatingvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/mcm-topology-api-rhel8
redhatvendor investigatingvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/mcm-topology-rhel8
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/console-rhel8
redhatno patchvia redhat_api
Product: OpenShift Service Mesh 2.0Fixed in: servicemesh-prometheus
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/grc-ui-api-rhel8
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/grc-ui-rhel8
redhatno patchvia redhat_api
Product: Red Hat Ceph Storage 5Fixed in: ceph
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: nodejs:12/nodejs
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/search-api-rhel8
redhatno patchvia redhat_api
Product: Red Hat build of Apicurio Registry 2Fixed in: io.apicurio-apicurio-registry
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/application-ui-rhel8
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: nodejs
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/console-api-rhel8
redhatno patchvia redhat_api
Product: OpenShift Service Mesh 2.0Fixed in: servicemesh-grafana
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-nodejs12-nodejs
redhatend of lifevia redhat_api
Product: Red Hat OpenShift GitOpsFixed in: openshift-gitops-1/argocd-rhel8
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-thanos-rhel8
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-prometheus-rhel9
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-metering-hadoop
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-grafana
redhatend of lifevia redhat_api
Product: Red Hat Ceph Storage 4Fixed in: ceph
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-console
redhatend of lifevia redhat_api
Product: Red Hat Ceph Storage 4Fixed in: rhceph/rhceph-4-dashboard-rhel8
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: nodejs:12/nodejs-nodemon
redhatend of lifevia redhat_api
Product: Red Hat Virtualization 4Fixed in: cockpit-ovirt
redhatend of lifevia redhat_api
Product: Red Hat Quay 3Fixed in: quay/quay-rhel8

Vendor Advisories (2)

npmGHSA-93q8-gq69-wqmwhigh

Inefficient Regular Expression Complexity in chalk/ansi-regex

Sep 20, 2021
redhatCVE-2021-3807Moderate

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

Sep 17, 2021

References

github.com / chalk/ansi-regex/commit/8d1d7cdb586269882c4bdc1b7325d0c58c8f76f9
PatchThird Party Advisory
huntr.dev / bounties/5b3cf33b-ede0-4398-9974-800876dfd994
ExploitIssue TrackingPatchThird Party Advisory
security.netapp.com / advisory/ntap-20221014-0002
Third Party Advisory
oracle.com / security-alerts/cpuapr2022.html
PatchThird Party Advisory