BlackTreeCVE Intelligence
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Full vulnerability report · 2021
CVE-2021-3807High confidence

Inefficient Regular Expression Complexity in chalk/ansi-regex

chalk · chalk/ansi-regex

7.5HighCVSS 3.1
Recommended action
Within 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:Critical, raised one band.upgradedsince 3 Aug 2024

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 3.55% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs chalk chalk/ansi-regex and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 3 daysRemediation target: Within 90 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

5 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcenode-ansi-regexVendor fix publishedDebian records a fixed source-package version for this release.5.0.1-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian bookwormbookworm · sourcenode-ansi-regexVendor fix publishedDebian records a fixed source-package version for this release.5.0.1-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian forkyforky · sourcenode-ansi-regexVendor fix publishedDebian records a fixed source-package version for this release.5.0.1-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian sidsid · sourcenode-ansi-regexVendor fix publishedDebian records a fixed source-package version for this release.5.0.1-1Debian Security Tracker ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivenode-ansi-regexUnder evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2021-3807 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitynodejs-ansi-regex: Regular expression denial of service (ReDoS) matching ANSI escape codes
157 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • migration-toolkit-virtualization/mtv-ui-rhel8 as a component of Migration Toolkit for Virtualization
  • kiali as a component of OpenShift Service Mesh 1
  • kiali.src as a component of OpenShift Service Mesh 1
  • servicemesh-grafana as a component of OpenShift Service Mesh 1
  • servicemesh-grafana-prometheus as a component of OpenShift Service Mesh 1
  • servicemesh-grafana.src as a component of OpenShift Service Mesh 1
  • servicemesh-prometheus as a component of OpenShift Service Mesh 1
  • servicemesh-prometheus.src as a component of OpenShift Service Mesh 1
  • servicemesh-grafana as a component of OpenShift Service Mesh 2.0
  • servicemesh-grafana-prometheus as a component of OpenShift Service Mesh 2.0
  • servicemesh-grafana.src as a component of OpenShift Service Mesh 2.0
  • servicemesh-prometheus as a component of OpenShift Service Mesh 2.0
Summary
A regular expression denial of service (ReDoS) vulnerability was found in nodejs-ansi-regex. This could possibly cause an application using ansi-regex to use an excessive amount of CPU time when matching crafted ANSI escape codes.
Remediation
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2021-2021

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

ansi-regex is vulnerable to Inefficient Regular Expression Complexity

What

ansi-regex is vulnerable to Inefficient Regular Expression Complexity

Why

The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

ansi-regex is vulnerable to Inefficient Regular Expression Complexity

Why

The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
a network path → Inefficient Regular Expression Complexity → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-1333 ↗

CWE-1333: Inefficient Regular Expression Complexity. The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-1333Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

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Official advisory ↗
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Official advisory ↗
BSI · German · WID-SEC-2022-1375JFrog Artifactory: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in JFrog Artifactory ausnutzen, um seine Privilegien zu erweitern, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen und einen Denial-of-Service-Zustand auszulösen.

Official advisory ↗
BSI · German · WID-SEC-2022-0607Red Hat FUSE: Mehrere Schwachstellen

Ein entfernter, anonymer, authentisierter oder lokaler Angreifer kann mehrere Schwachstellen in Red Hat FUSE ausnutzen, um vertrauliche Informationen offenzulegen, beliebigen Code auszuführen, einen Denial of Service Zustand herbeizuführen, Sicherheitsmaßnahmen zu umgehen, Daten und Informationen zu manipulieren und seine Privilegien zu erweitern.

Official advisory ↗
BSI · German · WID-SEC-2023-0856IBM QRadar SIEM: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in IBM QRadar SIEM ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.

Official advisory ↗
BSI · German · WID-SEC-2023-0857IBM QRadar SIEM: Mehrere Schwachstellen

Ein lokaler Angreifer kann mehrere Schwachstellen in IBM QRadar SIEM ausnutzen, um beliebigen Programmcode auszuführen, einen Denial of Service Zustand herbeizuführen, Dateien manipulieren oder Sicherheitsvorkehrungen zu umgehen.

Official advisory ↗
BSI · German · WID-SEC-2022-0103Node.js: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Node.js ausnutzen, um einen Denial of Service Angriff durchzuführen oder Code zur Ausführung zu bringen.

Official advisory ↗
BSI · German · WID-SEC-2022-0699Red Hat Virtualization: Mehrere Schwachstellen ermöglichen Denial of Service

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Virtualization ausnutzen, um einen Denial of Service Angriff durchzuführen oder Informationen offenzulegen.

Official advisory ↗
BSI · German · WID-SEC-2022-2133JFrog Artifactory: Mehrere Schwachstellen in Drittanbieter-Komponenten

JFrog Artifactory nutzt verschiedene Komponenten von Drittanbietern. Diese enthalten mehrere Schwachstellen. Neuen Informationen von JFrog zufolge sind diese Schwachstellen jedoch nicht in Produkten von JFrog ausnutzbar.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20210922Security Bulletin 22 Sep 2021

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 22 Sep 2021, published on 22 September 2021. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
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De multiples vulnérabilités ont été découvertes dans les produits Atlassian. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et une atteinte à la confidentialité des données.

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0608Multiples vulnérabilités dans les produits IBM

ecord?id=CVE-2020-28469 Référence CVE CVE-2020-36518 https://www.cve.org/CVERecord?id=CVE-2020-36518 Référence CVE CVE-2020-4301 https://www.cve.org/CVERecord?id=CVE-2020-4301 Référence CVE CVE-2021-20468 https://www.cve.org/CVERecord?id=CVE-2021-20468 Référence CVE CVE-2021-23438 https://www.cve.org/CVERecord?id=CVE-2021-23438 Référence CVE CVE-2021-28918 https://www.cve.org/CVERecord?id=CVE-2021-28918 Référence CVE CVE-2021-29418 https://www.cve.org/CVERecord?id=CVE-2021-29418 Référence CVE CVE-2021-29823 https://www.cve.org/CVERecord?id=CVE-2021-29823 Référence CVE CVE-2021-3749 https://www.cve.org/CVERecord?id=CVE-2021-3749 Référence CVE CVE-2021-3807 https://www.cve.org/CVERecord?id=CVE-2021-3807 Référence CVE CVE-2021-39009 https://www.cve.org/CVERecord?id=CVE-2021-39009 Référence CVE CVE-2021-39045 https://www.cve.org/CVERecord?id=CVE-2021-39045 Référence CVE CVE-2021-43797 https://www.cve.org/CVERecord?id=CVE-2021-43797 Référence CVE CVE-2021-44531 https://www.cve.org/CVERecord?id=CVE-2021-44531 Référence CVE CVE-2021-44532 https://www.cve.org/CVERecord?id=CVE-2021-44532 Référence CVE CVE-2021-44533 https://www.cve.org/CVERecord?id=CVE-2021-44533 Référence CVE CVE-2022-21803 https://www.cve.org/CVERecord?id=CVE-2022-21803 Référence CVE CVE-2022-21824 https://www.cve.org/CVERecord?id=C

Official advisory ↗
CERT-FR · French · CERTFR-2023-AVI-0276Multiples vulnérabilités dans les produits IBM

ecord?id=CVE-2021-32803 Référence CVE CVE-2021-32804 https://www.cve.org/CVERecord?id=CVE-2021-32804 Référence CVE CVE-2021-3677 https://www.cve.org/CVERecord?id=CVE-2021-3677 Référence CVE CVE-2021-37136 https://www.cve.org/CVERecord?id=CVE-2021-37136 Référence CVE CVE-2021-37137 https://www.cve.org/CVERecord?id=CVE-2021-37137 Référence CVE CVE-2021-3765 https://www.cve.org/CVERecord?id=CVE-2021-3765 Référence CVE CVE-2021-37701 https://www.cve.org/CVERecord?id=CVE-2021-37701 Référence CVE CVE-2021-37712 https://www.cve.org/CVERecord?id=CVE-2021-37712 Référence CVE CVE-2021-37713 https://www.cve.org/CVERecord?id=CVE-2021-37713 Référence CVE CVE-2021-3807 https://www.cve.org/CVERecord?id=CVE-2021-3807 Référence CVE CVE-2021-3918 https://www.cve.org/CVERecord?id=CVE-2021-3918 Référence CVE CVE-2021-39227 https://www.cve.org/CVERecord?id=CVE-2021-39227 Référence CVE CVE-2021-42581 https://www.cve.org/CVERecord?id=CVE-2021-42581 Référence CVE CVE-2021-42740 https://www.cve.org/CVERecord?id=CVE-2021-42740 Référence CVE CVE-2021-43797 https://www.cve.org/CVERecord?id=CVE-2021-43797 Référence CVE CVE-2022-1552 https://www.cve.org/CVERecord?id=CVE-2022-1552 Référence CVE CVE-2022-1705 https://www.cve.org/CVERecord?id=CVE-2022-1705 Référence CVE CVE-2022-1962 https://www.cve.org/CVERecord?id=CVE-2022

Official advisory ↗
CERT-FR · French · CERTFR-2023-AVI-0240Multiples vulnérabilités dans les produits IBM

ps://www.ibm.com/support/pages/node/6963958 Bulletin de sécurité IBM 6963960 du 16 mars 2023 https://www.ibm.com/support/pages/node/6963960 Bulletin de sécurité IBM 6963962 du 16 mars 2023 https://www.ibm.com/support/pages/node/6963962 Bulletin de sécurité IBM 6956237 du 17 mars 2023 https://www.ibm.com/support/pages/node/6956237 Référence CVE CVE-2015-7501 https://www.cve.org/CVERecord?id=CVE-2015-7501 Référence CVE CVE-2020-36557 https://www.cve.org/CVERecord?id=CVE-2020-36557 Référence CVE CVE-2020-36558 https://www.cve.org/CVERecord?id=CVE-2020-36558 Référence CVE CVE-2021-3640 https://www.cve.org/CVERecord?id=CVE-2021-3640 Référence CVE CVE-2021-3807 https://www.cve.org/CVERecord?id=CVE-2021-3807 Référence CVE CVE-2022-0168 https://www.cve.org/CVERecord?id=CVE-2022-0168 Référence CVE CVE-2022-0494 https://www.cve.org/CVERecord?id=CVE-2022-0494 Référence CVE CVE-2022-1055 https://www.cve.org/CVERecord?id=CVE-2022-1055 Référence CVE CVE-2022-1184 https://www.cve.org/CVERecord?id=CVE-2022-1184 Référence CVE CVE-2022-1353 https://www.cve.org/CVERecord?id=CVE-2022-1353 Référence CVE CVE-2022-2078 https://www.cve.org/CVERecord?id=CVE-2022-2078 Référence CVE CVE-2022-24448 https://www.cve.org/CVERecord?id=CVE-2022-24448 Référence CVE CVE-2022-24785 https://www.cve.org/CVERecord?id=CVE-2022-2478

Official advisory ↗
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De multiples vulnérabilités ont été découvertes dans les produits IBM . Elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, une injection de code indirecte à distance (XSS), une atteinte à la confidentialité des données, un contournement de la politique de sécurité et un déni de service à distance.

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Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-924Multiples vulnérabilités dans IBM QRadar

ord?id=CVE-2021-23346 Référence CVE CVE-2021-23566 https://www.cve.org/CVERecord?id=CVE-2021-23566 Référence CVE CVE-2021-32803 https://www.cve.org/CVERecord?id=CVE-2021-32803 Référence CVE CVE-2021-32804 https://www.cve.org/CVERecord?id=CVE-2021-32804 Référence CVE CVE-2021-33502 https://www.cve.org/CVERecord?id=CVE-2021-33502 Référence CVE CVE-2021-3765 https://www.cve.org/CVERecord?id=CVE-2021-3765 Référence CVE CVE-2021-37701 https://www.cve.org/CVERecord?id=CVE-2021-37701 Référence CVE CVE-2021-37712 https://www.cve.org/CVERecord?id=CVE-2021-37712 Référence CVE CVE-2021-37713 https://www.cve.org/CVERecord?id=CVE-2021-37713 Référence CVE CVE-2021-3807 https://www.cve.org/CVERecord?id=CVE-2021-3807 Référence CVE CVE-2021-3918 https://www.cve.org/CVERecord?id=CVE-2021-3918 Référence CVE CVE-2021-44906 https://www.cve.org/CVERecord?id=CVE-2021-44906 Référence CVE CVE-2021-44907 https://www.cve.org/CVERecord?id=CVE-2021-44907 Référence CVE CVE-2022-0155 https://www.cve.org/CVERecord?id=CVE-2022-0155 Référence CVE CVE-2022-0536 https://www.cve.org/CVERecord?id=CVE-2022-0536 Gestion détaillée du document le 18 octobre 2022 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr fr

Official advisory ↗
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ecord?id=CVE-2020-28469 Référence CVE CVE-2020-36518 https://www.cve.org/CVERecord?id=CVE-2020-36518 Référence CVE CVE-2020-4301 https://www.cve.org/CVERecord?id=CVE-2020-4301 Référence CVE CVE-2021-20468 https://www.cve.org/CVERecord?id=CVE-2021-20468 Référence CVE CVE-2021-23438 https://www.cve.org/CVERecord?id=CVE-2021-23438 Référence CVE CVE-2021-28918 https://www.cve.org/CVERecord?id=CVE-2021-28918 Référence CVE CVE-2021-29418 https://www.cve.org/CVERecord?id=CVE-2021-29418 Référence CVE CVE-2021-29823 https://www.cve.org/CVERecord?id=CVE-2021-29823 Référence CVE CVE-2021-3749 https://www.cve.org/CVERecord?id=CVE-2021-3749 Référence CVE CVE-2021-3807 https://www.cve.org/CVERecord?id=CVE-2021-3807 Référence CVE CVE-2021-39009 https://www.cve.org/CVERecord?id=CVE-2021-39009 Référence CVE CVE-2021-39045 https://www.cve.org/CVERecord?id=CVE-2021-39045 Référence CVE CVE-2021-43797 https://www.cve.org/CVERecord?id=CVE-2021-43797 Référence CVE CVE-2021-44531 https://www.cve.org/CVERecord?id=CVE-2021-44531 Référence CVE CVE-2021-44532 https://www.cve.org/CVERecord?id=CVE-2021-44532 Référence CVE CVE-2021-44533 https://www.cve.org/CVERecord?id=CVE-2021-44533 Référence CVE CVE-2022-21803 https://www.cve.org/CVERecord?id=CVE-2022-21803 Référence CVE CVE-2022-21824 https://www.cve.org/CVERecord?id=C

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-510Multiples vulnérabilités dans IBM QRadar

ord?id=CVE-2021-23362 Référence CVE CVE-2021-27290 https://www.cve.org/CVERecord?id=CVE-2021-27290 Référence CVE CVE-2021-32803 https://www.cve.org/CVERecord?id=CVE-2021-32803 Référence CVE CVE-2021-32804 https://www.cve.org/CVERecord?id=CVE-2021-32804 Référence CVE CVE-2021-33502 https://www.cve.org/CVERecord?id=CVE-2021-33502 Référence CVE CVE-2021-3672 https://www.cve.org/CVERecord?id=CVE-2021-3672 Référence CVE CVE-2021-37701 https://www.cve.org/CVERecord?id=CVE-2021-37701 Référence CVE CVE-2021-37712 https://www.cve.org/CVERecord?id=CVE-2021-37712 Référence CVE CVE-2021-37713 https://www.cve.org/CVERecord?id=CVE-2021-37713 Référence CVE CVE-2021-3807 https://www.cve.org/CVERecord?id=CVE-2021-3807 Référence CVE CVE-2021-3918 https://www.cve.org/CVERecord?id=CVE-2021-3918 Gestion détaillée du document le 01 juin 2022 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la Défense et de la Sécurité Nationale / Agence nationale de la sécurité des systèmes d'information

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-494Multiples vulnérabilités dans les produits IBM

De multiples vulnérabilités ont été découvertes dans les produits IBM. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et un contournement de la politique de sécurité.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2021-012193ansi-regex における非効率的な正規表現の複雑さに関する脆弱性

ansi-regex には、非効率的な正規表現の複雑さに関する脆弱性が存在します。

Official advisory ↗
NCSC-NL · Dutch · NCSC-2026-0034Kwetsbaarheden verholpen in Atlassian producten

Recent updates address critical security vulnerabilities across various software, including Ansible, Node.js, and Golang packages, with significant fixes for ReDoS and sensitive data exposure issues.

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
Action
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
Official vendor articles1 stored document

Linked articles are downloaded and versioned as source evidence. A CVE mention or approved update relationship does not, by itself, verify a fix for every product branch.

04

Evidence and provenance

Published 17 Sept 2021 · Last source change 3 Aug 2024, 17:09 UTC · CWE-1333 · Inefficient Regular Expression Complexity

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2021-2021
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2021-2021↗Vendor CSAF · Red Hat Product Security↗Public exploit reference↗Patch or update reference↗Patch or update reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2021-3807 · cve.blacktree.nl