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6.8 Medium

CVE-2025-22150 Undici is an HTTP/1.1 client

Description

Undici is an HTTP/1.1 client. Starting in version 4.5.0 and prior to versions 5.28.5, 6.21.1, and 7.2.3, undici uses `Math.random()` to choose the boundary for a multipart/form-data request. It is known that the output of `Math.random()` can be predicted if several of its generated values are known. If there is a mechanism in an app that sends multipart requests to an attacker-controlled website, they can use this to leak the necessary values. Therefore, an attacker can tamper with the requests going to the backend APIs if certain conditions are met. This is fixed in versions 5.28.5, 6.21.1, and 7.2.3. As a workaround, do not issue multipart requests to attacker controlled servers.

Affected products and versions

Product Affected versions Fixed in
undici 7.0 7.0.0 → < 7.2.3 7.2.3
undici 6.0 6.0.0 → < 6.21.1 6.21.1
undici 4.5 4.5.0 → < 5.28.5 5.28.5

References

Timeline

  1. Published
  2. Last modified

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-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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