CVE-2026-58044

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{"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 desincronizaci\u00f3n de solicitudes para proxies de reenv\u00edo basados en Node.js que reconstruyen los encabezados salientes a partir de los encabezados visibles de \u2019IncomingMessage\u2019 mientras canalizan el cuerpo original a una conexi\u00f3n de backend reutilizada.\n\nNode.js puede omitir encabezados m\u00e1s all\u00e1 de \u2019maxHeadersCount\u2019 / \u2019maxHeaderPairs\u2019 de \u2019req.headers\u2019, \u2019req.rawHeaders\u2019 y \u2019req.headersDistinct\u2019, mientras sigue utilizando esos encabezados omitidos internamente para el encuadre de mensajes HTTP. En particular, \u2019Content-Length\u2019 puede ocultarse de userland mientras el cuerpo de la solicitud a\u00fan se entrega.\n\nEsta vulnerabilidad afecta a todas las l\u00edneas 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"}]}

{"bugzilla": {"description": "nodejs: Node.js: Request smuggling via HTTP client header truncation", "id": "2510853", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2510853"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-444", "details": ["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.\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.\nThis vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.", "A flaw was found in Node.js. The Node.js HTTP client can cause a request desynchronization in forwarding proxies, potentially leading to request smuggling. This vulnerability arises when the HTTP client omits certain headers, such as Content-Length, from being visible to the proxy application while still using them internally for message processing. This inconsistency can allow an attacker to bypass security controls and inject malicious requests, impacting the integrity of network communications."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-58044", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "nodejs22", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "nodejs24", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "nodejs:22/nodejs", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "nodejs:24/nodejs", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "nodejs:22/nodejs", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "nodejs:24/nodejs", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "nodejs22", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "nodejs24", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "nodejs26", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-08-04T00:49:58Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-58044\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-58044\nhttps://nodejs.org/en/blog/vulnerability/july-2026-security-releases"], "statement": "This flaw impacts Confidentiality and Integrity with zero effect on Availability (C:L, I:L, A:N). Practical exploitation occurs when Node.js operates as a forwarding proxy that reconstructs outbound headers from incoming requests while piping the message body over reused backend connections. Header desynchronization between internal processing and application-visible headers allows HTTP request smuggling. Standard Node.js web applications, non-proxy architectures, or proxies that do not reuse backend socket connections are completely unaffected. Red Hat assesses Confidentiality at Low (C:L) rather than None (C:N) because request smuggling in a proxy environment can expose sensitive adjacent request data, resulting in a 4.8 score versus CVEOrg's 3.7.", "threat_severity": "Moderate"}

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