Node.js and 2 others: HTTP Request Smuggling
CVE-2026-48932 is fixed in 4 products on 2 platforms, first by Node.js 26.3.1, released June 17, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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**.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Node.js | 26.3.1 | Node.js 26.3.1 | Jun 17, 2026 |
| Node.js (LTS) | 24.17.0 | Node.js (LTS) 24.17.0 | Jun 17, 2026 |
| Node.js 22 | 22.23.0 | Node.js 22 22.23.0 | Jun 17, 2026 |
| Linux | |||
| nodejs · Debian 14 | 24.19.0+dfsg+~cs24.13.3-1 | DEBIAN-CVE-2026-48932 | Sep 7, 2026 |
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