Node.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.
This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.
Analysis
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| nodejs | node | unaffected |
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Tue, 04 Aug 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Tue, 04 Aug 2026 01:00:00 +0000
| Type | Values Removed | Values Added |
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| 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. Node.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. This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**. | |
| Weaknesses | CWE-444 | |
| References |
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| Metrics |
cvssV3_0
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: hackerone
Published:
Updated: 2026-08-04T15:03:46.089Z
Reserved: 2026-06-27T15:00:00.780Z
Link: CVE-2026-58044
Vulnrichment
Updated: 2026-08-04T14:19:39.215Z
NVD
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Redhat
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OpenCVE Enrichment
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