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5.9 Medium

CVE-2026-22036 Undici is an HTTP/1.1 client for Node.js

Description

Undici is an HTTP/1.1 client for Node.js. Prior to 7.18.0 and 6.23.0, the number of links in the decompression chain is unbounded and the default maxHeaderSize allows a malicious server to insert thousands compression steps leading to high CPU usage and excessive memory allocation. This vulnerability is fixed in 7.18.0 and 6.23.0.

Affected products and versions

Product Affected versions Fixed in
undici 7.0 7.0.0 → < 7.18.2 7.18.2
undici 6.23 earliest → < 6.23.0 6.23.0

References

Timeline

  1. Published
  2. Last modified

Other CVEs of undici

The 15 CVEs of undici →
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 CVE-2024-30260 Undici is an HTTP/1.1 client, written from scratch for Node.js 3.9 Low
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