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6.5 Medium

CVE-2023-23936 Undici is an HTTP/1.1 client for Node.js

Description

Undici is an HTTP/1.1 client for Node.js. Starting with version 2.0.0 and prior to version 5.19.1, the undici library does not protect `host` HTTP header from CRLF injection vulnerabilities. This issue is patched in Undici v5.19.1. As a workaround, sanitize the `headers.host` string before passing to undici.

Affected products and versions

Product Affected versions Fixed in
undici 2.0 2.0.0 → < 5.19.1 5.19.1

References

Timeline

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Other CVEs of undici

The 15 CVEs of undici →
CVE-2026-22036 Undici is an HTTP/1.1 client for Node.js 5.9 Medium CVE-2025-47279 Undici is an HTTP/1.1 client for Node.js 3.1 Low CVE-2025-22150 Undici is an HTTP/1.1 client 6.8 Medium CVE-2024-38372 Undici is an HTTP/1.1 client, written from scratch for Node.js 2.0 Low
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