{"cvss":3.7,"datePublished":"2026-08-04T01:16:20.247","dateUpdated":"2026-10-23T23:10:00.157","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**.","id":"CVE-2026-58044","raw":{"affected":[{"affectedData":[{"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"}]}],"source":"support@hackerone.com"}],"cveTags":[],"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**."},{"lang":"es","value":"Una falla en el cliente HTTP de Node.js puede causar una desincronización de solicitudes para proxies de reenvío basados en Node.js que reconstruyen los encabezados salientes a partir de los encabezados visibles de ’IncomingMessage’ mientras canalizan el cuerpo original a una conexión de backend reutilizada.\n\nNode.js puede omitir encabezados más allá de ’maxHeadersCount’ / ’maxHeaderPairs’ de ’req.headers’, ’req.rawHeaders’ y ’req.headersDistinct’, mientras sigue utilizando esos encabezados omitidos internamente para el encuadre de mensajes HTTP. En particular, ’Content-Length’ puede ocultarse de userland mientras el cuerpo de la solicitud aún se entrega.\n\nEsta vulnerabilidad afecta a todas las líneas de lanzamiento compatibles: Node.js 22, Node.js 24 y Node.js 26."}],"id":"CVE-2026-58044","lastModified":"2026-10-23T23:10:00.157","metrics":{"cvssMetricV30":[{"cvssData":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.0"},"exploitabilityScore":2.2,"impactScore":1.4,"source":"support@hackerone.com","type":"Secondary"}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"id":"CVE-2026-58044","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-08-04T14:19:38.226326Z","version":"2.0.3"}}]},"published":"2026-08-04T01:16:20.247","references":[{"source":"support@hackerone.com","url":"https://nodejs.org/en/blog/vulnerability/july-2026-security-releases"}],"sourceIdentifier":"support@hackerone.com","vulnStatus":"Awaiting Analysis","weaknesses":[{"description":[{"lang":"en","value":"CWE-444"}],"source":"support@hackerone.com","type":"Secondary"}]},"severity":"LOW","source":"nvd","title":"A flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based forwarding proxies that rebuild..."}