Description (CNA)
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**.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| nodejs / node | affected 26.5.0 through 26.5.0; affected 24.18.0 through 24.18.0; affected 22.23.1 through 22.23.1 |
CWE
CWE-444
References
ADP enrichment
No English description supplied.
No references supplied.