{"api_version":"1","generated_at":"2026-07-23T17:56:20+00:00","cve":"CVE-2021-23424","urls":{"html":"https://cve.report/CVE-2021-23424","api":"https://cve.report/api/cve/CVE-2021-23424.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-23424","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-23424"},"summary":{"title":"CVE-2021-23424","description":"This affects all versions of package ansi-html. If an attacker provides a malicious string, it will get stuck processing the input for an extremely long time.","state":"PUBLIC","assigner":"report@snyk.io","published_at":"2021-08-18 17:15:00","updated_at":"2022-08-04 19:26:00"},"problem_types":["NVD-CWE-noinfo"],"metrics":[],"references":[{"url":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1567198","name":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1567198","refsource":"MISC","tags":[],"title":"Regular Expression Denial of Service (ReDoS) in org.webjars.npm:ansi-html | Snyk","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://snyk.io/vuln/SNYK-JS-ANSIHTML-1296849","name":"https://snyk.io/vuln/SNYK-JS-ANSIHTML-1296849","refsource":"MISC","tags":[],"title":"Regular Expression Denial of Service (ReDoS) in ansi-html | Snyk","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/Tjatse/ansi-html/issues/19","name":"https://github.com/Tjatse/ansi-html/issues/19","refsource":"MISC","tags":[],"title":"Exponential ReDoS · Issue #19 · Tjatse/ansi-html · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-23424","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23424","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"LEGACY","value":"Ben Caller","lang":""},{"source":"LEGACY","value":"Robert McLaughlin","lang":""}],"nvd_cpes":[{"cve_year":"2021","cve_id":"23424","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"ansi-html_project","cpe5":"ansi-html","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"node.js","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2021-23424","qid":"981169","title":"Nodejs (npm) Security Update for ansi-html (GHSA-whgm-jr23-g3j9)"}]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ASSIGNER":"report@snyk.io","DATE_PUBLIC":"2021-08-18T16:11:23.010278Z","ID":"CVE-2021-23424","STATE":"PUBLIC","TITLE":"Regular Expression Denial of Service (ReDoS)"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"ansi-html","version":{"version_data":[{"version_affected":">=","version_value":"0"}]}}]},"vendor_name":"n/a"}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Regular Expression Denial of Service (ReDoS)"}]}]},"references":{"reference_data":[{"refsource":"MISC","url":"https://github.com/Tjatse/ansi-html/issues/19","name":"https://github.com/Tjatse/ansi-html/issues/19"},{"refsource":"MISC","url":"https://snyk.io/vuln/SNYK-JS-ANSIHTML-1296849","name":"https://snyk.io/vuln/SNYK-JS-ANSIHTML-1296849"},{"refsource":"MISC","url":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1567198","name":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1567198"}]},"description":{"description_data":[{"lang":"eng","value":"This affects all versions of package ansi-html. If an attacker provides a malicious string, it will get stuck processing the input for an extremely long time."}]},"impact":{"cvss":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},"credit":[{"lang":"eng","value":"Ben Caller"},{"lang":"eng","value":"Robert McLaughlin"}]},"nvd":{"publishedDate":"2021-08-18 17:15:00","lastModifiedDate":"2022-08-04 19:26:00","problem_types":["NVD-CWE-noinfo"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL","baseScore":5},"severity":"MEDIUM","exploitabilityScore":10,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:ansi-html_project:ansi-html:*:*:*:*:*:node.js:*:*","versionEndExcluding":"0.0.8","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"23424","Ordinal":"198151","Title":"CVE-2021-23424","CVE":"CVE-2021-23424","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"23424","Ordinal":"1","NoteData":"This affects all versions of package ansi-html. If an attacker provides a malicious string, it will get stuck processing the input for an extremely long time.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"23424","Ordinal":"2","NoteData":"2021-08-18","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"23424","Ordinal":"3","NoteData":"2021-08-18","Type":"Other","Title":"Modified"}]}}}