{"cve":{"cve_id":"CVE-2026-21710","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.25044,"epss_percentile":0.97756,"epss_as_of":"2026-08-26","description":"A flaw in Node.js HTTP request handling causes an uncaught `TypeError` when a request is received with a header named `__proto__` and the application accesses `req.headersDistinct`.\r\n\r\nWhen this occurs, `dest[\"__proto__\"]` resolves to `Object.prototype` rather than `undefined`, causing `.push()` to be called on a non-array. This exception is thrown synchronously inside a property getter and cannot be intercepted by `error` event listeners, meaning it cannot be handled without wrapping every `req.headersDistinct` access in a `try/catch`.\r\n\r\n* This vulnerability affects all Node.js HTTP servers on **20.x, 22.x, 24.x, and v25.x**","published_at":"2026-03-30T19:07:28.558000Z","last_modified_at":"2026-08-19T14:32:04.833000Z","cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":true,"ssvc_technical_impact":"partial","cwes":["CWE-843","CWE-770"],"nvd_references":["https://nodejs.org/en/blog/vulnerability/march-2026-security-releases"],"vuln_status":"Analyzed","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-08-19T16:41:57.515079Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"20.20.1","version_start_inclusive":true,"version_end":"20.20.1","version_end_inclusive":true,"cpe23_uri":"cve5:nodejs:node:20.20.1:20.20.1"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"22.22.1","version_start_inclusive":true,"version_end":"22.22.1","version_end_inclusive":true,"cpe23_uri":"cve5:nodejs:node:22.22.1:22.22.1"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"24.14.0","version_start_inclusive":true,"version_end":"24.14.0","version_end_inclusive":true,"cpe23_uri":"cve5:nodejs:node:24.14.0:24.14.0"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"25.8.1","version_start_inclusive":true,"version_end":"25.8.1","version_end_inclusive":true,"cpe23_uri":"cve5:nodejs:node:25.8.1:25.8.1"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"4.0","version_start_inclusive":true,"version_end":"4.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:4.0:4.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"5.0","version_start_inclusive":true,"version_end":"5.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:5.0:5.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"6.0","version_start_inclusive":true,"version_end":"6.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:6.0:6.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"7.0","version_start_inclusive":true,"version_end":"7.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:7.0:7.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"8.0","version_start_inclusive":true,"version_end":"8.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:8.0:8.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"9.0","version_start_inclusive":true,"version_end":"9.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:9.0:9.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"10.0","version_start_inclusive":true,"version_end":"10.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:10.0:10.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"11.0","version_start_inclusive":true,"version_end":"11.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:11.0:11.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"12.0","version_start_inclusive":true,"version_end":"12.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:12.0:12.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"13.0","version_start_inclusive":true,"version_end":"13.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:13.0:13.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"14.0","version_start_inclusive":true,"version_end":"14.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:14.0:14.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"15.0","version_start_inclusive":true,"version_end":"15.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:15.0:15.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"16.0","version_start_inclusive":true,"version_end":"16.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:16.0:16.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"17.0","version_start_inclusive":true,"version_end":"17.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:17.0:17.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"18.0","version_start_inclusive":true,"version_end":"18.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:18.0:18.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node","product_name":"node","version_start":"19.0","version_start_inclusive":true,"version_end":"19.*","version_end_inclusive":false,"cpe23_uri":"cve5:nodejs:node:19.0:19.*"},{"vendor_slug":"nodejs","vendor_name":"nodejs","product_slug":"node.js","product_name":"node.js","version_start":null,"version_start_inclusive":null,"version_end":"20.20.1","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*"},{"vendor_slug":"redhat","vendor_name":"RedHat","product_slug":"enterprise-linux","product_name":"enterprise_linux","version_start":"8.0","version_start_inclusive":true,"version_end":"8.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*"},{"vendor_slug":"redhat","vendor_name":"RedHat","product_slug":"enterprise-linux","product_name":"enterprise_linux","version_start":"9.0","version_start_inclusive":true,"version_end":"9.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*"},{"vendor_slug":"redhat","vendor_name":"RedHat","product_slug":"enterprise-linux","product_name":"enterprise_linux","version_start":"10.0","version_start_inclusive":true,"version_end":"10.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*"},{"vendor_slug":"redhat","vendor_name":"RedHat","product_slug":"enterprise-linux-eus","product_name":"enterprise_linux_eus","version_start":"9.4","version_start_inclusive":true,"version_end":"9.4","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:redhat:enterprise_linux_eus:9.4:*:*:*:*:*:*:*"},{"vendor_slug":"redhat","vendor_name":"RedHat","product_slug":"enterprise-linux-eus","product_name":"enterprise_linux_eus","version_start":"9.6","version_start_inclusive":true,"version_end":"9.6","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:redhat:enterprise_linux_eus:9.6:*:*:*:*:*:*:*"},{"vendor_slug":"redhat","vendor_name":"RedHat","product_slug":"enterprise-linux-eus","product_name":"enterprise_linux_eus","version_start":"10.0","version_start_inclusive":true,"version_end":"10.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:redhat:enterprise_linux_eus:10.0:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://nodejs.org/en/blog/vulnerability/march-2026-security-releases","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-03-30T19:07:28.558000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:51:25.596901Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:51:25.596901Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:51:25.596901Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-30T04:46:12.618760Z","label":"CVSS score revised","source":"vulnrichment"}]}