{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-58044", "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "state": "PUBLISHED", "assignerShortName": "hackerone", "dateReserved": "2026-06-27T15:00:00.780Z", "datePublished": "2026-08-04T00:49:58.297Z", "dateUpdated": "2026-08-04T00:49:58.297Z"}, "containers": {"cna": {"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**."}], "affected": [{"defaultStatus": "unaffected", "vendor": "nodejs", "product": "node", "versions": [{"version": "26.5.0", "status": "affected", "lessThanOrEqual": "26.5.0", "versionType": "semver"}, {"version": "24.18.0", "status": "affected", "lessThanOrEqual": "24.18.0", "versionType": "semver"}, {"version": "22.23.1", "status": "affected", "lessThanOrEqual": "22.23.1", "versionType": "semver"}]}], "references": [{"url": "https://nodejs.org/en/blog/vulnerability/july-2026-security-releases"}], "metrics": [{"cvssV3_0": {"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"}}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "cweId": "CWE-444", "description": "CWE-444 HTTP Request Smuggling"}]}], "providerMetadata": {"orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "shortName": "hackerone", "dateUpdated": "2026-08-04T00:49:58.297Z"}}}}

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