{"api_version":"1","generated_at":"2026-07-23T13:25:12+00:00","cve":"CVE-2021-23561","urls":{"html":"https://cve.report/CVE-2021-23561","api":"https://cve.report/api/cve/CVE-2021-23561.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-23561","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-23561"},"summary":{"title":"CVE-2021-23561","description":"All versions of package comb are vulnerable to Prototype Pollution via the deepMerge() function.","state":"PUBLIC","assigner":"report@snyk.io","published_at":"2021-12-10 20:15:00","updated_at":"2021-12-14 15:50:00"},"problem_types":["CWE-1321"],"metrics":[],"references":[{"url":"https://snyk.io/vuln/SNYK-JS-COMB-1730083","name":"N/A","refsource":"CONFIRM","tags":[],"title":"Prototype Pollution in comb | Snyk","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-23561","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23561","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"LEGACY","value":"Yeting Li","lang":""}],"nvd_cpes":[{"cve_year":"2021","cve_id":"23561","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"c2fo","cpe5":"comb","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"node.js","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ASSIGNER":"report@snyk.io","DATE_PUBLIC":"2021-12-10T20:00:20.001665Z","ID":"CVE-2021-23561","STATE":"PUBLIC","TITLE":"Prototype Pollution"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"comb","version":{"version_data":[{"version_affected":">=","version_value":"0"}]}}]},"vendor_name":"n/a"}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Prototype Pollution"}]}]},"references":{"reference_data":[{"refsource":"MISC","url":"https://snyk.io/vuln/SNYK-JS-COMB-1730083","name":"https://snyk.io/vuln/SNYK-JS-COMB-1730083"}]},"description":{"description_data":[{"lang":"eng","value":"All versions of package comb are vulnerable to Prototype Pollution via the deepMerge() function."}]},"impact":{"cvss":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"LOW"}},"credit":[{"lang":"eng","value":"Yeting Li"}]},"nvd":{"publishedDate":"2021-12-10 20:15:00","lastModifiedDate":"2021-12-14 15:50:00","problem_types":["CWE-1321"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL"},"exploitabilityScore":3.9,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":7.5},"severity":"HIGH","exploitabilityScore":10,"impactScore":6.4,"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:c2fo:comb:*:*:*:*:*:node.js:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"23561","Ordinal":"198288","Title":"CVE-2021-23561","CVE":"CVE-2021-23561","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"23561","Ordinal":"1","NoteData":"All versions of package comb are vulnerable to Prototype Pollution via the deepMerge() function.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"23561","Ordinal":"2","NoteData":"2021-12-10","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"23561","Ordinal":"3","NoteData":"2021-12-10","Type":"Other","Title":"Modified"}]}}}