Vulnerability · Published Sep 1, 2026 · Assigned by hackerone
CVE-2026-48932
Low 3.7
In plain English
A low-severity security flaw in node from nodejs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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**.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | nodejs | no fix listed | DEBIAN-CVE-2026-48932 |
| Debian:13 | nodejs | no fix listed | DEBIAN-CVE-2026-48932 |
| Debian:14 | nodejs | 24.19.0+dfsg+~cs24.13.3-1 | DEBIAN-CVE-2026-48932 |
| Ubuntu:24.04:LTS | nodejs | no fix listed | UBUNTU-CVE-2026-48932 |
| Ubuntu:26.04:LTS | nodejs | no fix listed | UBUNTU-CVE-2026-48932 |
| Ubuntu:26.10 | nodejs | no fix listed | UBUNTU-CVE-2026-48932 |
Affected products (as reported)
Weakness: CWE-444 · Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N