{"api_version":"1","generated_at":"2026-08-04T10:55:27+00:00","cve":"CVE-2026-58044","urls":{"html":"https://cve.report/CVE-2026-58044","api":"https://cve.report/api/cve/CVE-2026-58044.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-58044","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-58044"},"summary":{"title":"CVE-2026-58044","description":"A flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based forwarding proxies that rebuild outbound headers from the visible `IncomingMessage` headers while piping the original body to a reused backend connection.\r\n\r\nNode.js can omit headers beyond `maxHeadersCount` / `maxHeaderPairs` from `req.headers`, `req.rawHeaders`, and `req.headersDistinct`, while still using those omitted headers internally for HTTP message framing. In particular, `Content-Length` can be hidden from userland while the request body is still delivered.\r\n\r\nThis vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.","state":"PUBLISHED","assigner":"hackerone","published_at":"2026-08-04 01:16:20","updated_at":"2026-08-04 01:16:20"},"problem_types":["CWE-444","CWE-444 CWE-444 HTTP Request Smuggling"],"metrics":[{"version":"3.0","source":"support@hackerone.com","type":"Secondary","score":"3.7","severity":"LOW","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","data":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","baseScore":3.7,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"}},{"version":"3.0","source":"CNA","type":"DECLARED","score":"3.7","severity":"LOW","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","data":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.0"}}],"references":[{"url":"https://nodejs.org/en/blog/vulnerability/july-2026-security-releases","name":"https://nodejs.org/en/blog/vulnerability/july-2026-security-releases","refsource":"support@hackerone.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-58044","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58044","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"nodejs","product":"node","version":"affected 26.5.0 26.5.0 semver","platforms":[]},{"source":"CNA","vendor":"nodejs","product":"node","version":"affected 24.18.0 24.18.0 semver","platforms":[]},{"source":"CNA","vendor":"nodejs","product":"node","version":"affected 22.23.1 22.23.1 semver","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"node","vendor":"nodejs","versions":[{"lessThanOrEqual":"26.5.0","status":"affected","version":"26.5.0","versionType":"semver"},{"lessThanOrEqual":"24.18.0","status":"affected","version":"24.18.0","versionType":"semver"},{"lessThanOrEqual":"22.23.1","status":"affected","version":"22.23.1","versionType":"semver"}]}],"descriptions":[{"lang":"en","value":"A flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based forwarding proxies that rebuild outbound headers from the visible `IncomingMessage` headers while piping the original body to a reused backend connection.\r\n\r\nNode.js can omit headers beyond `maxHeadersCount` / `maxHeaderPairs` from `req.headers`, `req.rawHeaders`, and `req.headersDistinct`, while still using those omitted headers internally for HTTP message framing. In particular, `Content-Length` can be hidden from userland while the request body is still delivered.\r\n\r\nThis vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**."}],"metrics":[{"cvssV3_0":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-444","description":"CWE-444 HTTP Request Smuggling","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-04T00:49:58.297Z","orgId":"36234546-b8fa-4601-9d6f-f4e334aa8ea1","shortName":"hackerone"},"references":[{"url":"https://nodejs.org/en/blog/vulnerability/july-2026-security-releases"}]}},"cveMetadata":{"assignerOrgId":"36234546-b8fa-4601-9d6f-f4e334aa8ea1","assignerShortName":"hackerone","cveId":"CVE-2026-58044","datePublished":"2026-08-04T00:49:58.297Z","dateReserved":"2026-06-27T15:00:00.780Z","dateUpdated":"2026-08-04T00:49:58.297Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-04 01:16:20","lastModifiedDate":"2026-08-04 01:16:20","problem_types":["CWE-444","CWE-444 CWE-444 HTTP Request Smuggling"],"metrics":{"cvssMetricV30":[{"source":"support@hackerone.com","type":"Secondary","cvssData":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","baseScore":3.7,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.2,"impactScore":1.4}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"58044","Ordinal":"1","Title":"CVE-2026-58044","CVE":"CVE-2026-58044","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"58044","Ordinal":"1","NoteData":"A flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based forwarding proxies that rebuild outbound headers from the visible `IncomingMessage` headers while piping the original body to a reused backend connection.\r\n\r\nNode.js can omit headers beyond `maxHeadersCount` / `maxHeaderPairs` from `req.headers`, `req.rawHeaders`, and `req.headersDistinct`, while still using those omitted headers internally for HTTP message framing. In particular, `Content-Length` can be hidden from userland while the request body is still delivered.\r\n\r\nThis vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.","Type":"Description","Title":"CVE-2026-58044"}]}}}