# CVE-2026-48932: 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.

- Web page: https://patchblox.com/security/cve/CVE-2026-48932
- Priority: Routine
- CVSS: 3.7 (low)
- EPSS: 0.0027
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 1, 2026
- Weakness: CWE-444: HTTP Request Smuggling
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-48932

## 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**.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Node.js | 26.3.1 | [Node.js 26.3.1](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs-26.3.1.md) | Jun 17, 2026 |
| Windows apps | Node.js (LTS) | 24.17.0 | [Node.js (LTS) 24.17.0](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.lts-24.17.0.md) | Jun 17, 2026 |
| Windows apps | Node.js 22 | 22.23.0 | [Node.js 22 22.23.0](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.22-22.23.0.md) | Jun 17, 2026 |
| Linux | nodejs Debian 14 | 24.19.0+dfsg+~cs24.13.3-1 | [DEBIAN-CVE-2026-48932](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48932.md) | Sep 7, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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