# CVE-2022-35948: node-undici: undici is an HTTP/1.1 client, written from scratch for Node.js.`=< undici@5.8.0` users are vulnerable to _CRLF Inject...

CVE-2022-35948 is fixed in node-undici on 1 platform, first by DEBIAN-CVE-2022-35948, released August 15, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-35948
- Priority: Routine
- CVSS: 5.3 (medium)
- EPSS: 0.0139
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 15, 2022

## Description

undici is an HTTP/1.1 client, written from scratch for Node.js.`=< undici@5.8.0` users are vulnerable to _CRLF Injection_ on headers when using unsanitized input as request headers, more specifically, inside the `content-type` header. Example: ``` import { request } from 'undici' const unsanitizedContentTypeInput = 'application/json\r\n\r\nGET /foo2 HTTP/1.1' await request('http://localhost:3000, { method: 'GET', headers: { 'content-type': unsanitizedContentTypeInput }, }) ``` The above snippet will perform two requests in a single `request` API call: 1) `http://localhost:3000/` 2) `http://localhost:3000/foo2` This issue was patched in Undici v5.8.1. Sanitize input when sending content-type headers using user input as a workaround.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | node-undici Debian 12.15 (bookworm) | 5.8.2+dfsg1+~cs18.9.18.1-1 | [DEBIAN-CVE-2022-35948](https://patchblox.com/security/data/fix/linux/debian-cve-2022-35948.md) | Aug 15, 2022 |
| Linux | node-undici Debian 13.5 (trixie) | 5.8.2+dfsg1+~cs18.9.18.1-1 | [DEBIAN-CVE-2022-35948](https://patchblox.com/security/data/fix/linux/debian-cve-2022-35948.md) | Aug 15, 2022 |
| Linux | node-undici Debian 14 | 5.8.2+dfsg1+~cs18.9.18.1-1 | [DEBIAN-CVE-2022-35948](https://patchblox.com/security/data/fix/linux/debian-cve-2022-35948.md) | Aug 15, 2022 |

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