要点
- CVE-2025-22150 は undici に影響する深刻度「中」 (CVSS 6.8) の脆弱性です。
- 今後30日間に悪用される確率（EPSS）：0.76%（全脆弱性の 55.4% より高い）。
- 対処：5.28.5, 6.21.1, 7.2.3 以降に更新してください。
| パッケージ | 影響を受けるバージョン | 修正済みバージョン |
|---|
| undici npm | ≥ 4.5.0, < 5.28.5≥ 6.0.0, < 6.21.1≥ 7.0.0, < 7.2.3
| 5.28.56.21.17.2.3
|
概要
Impact
Undici fetch() 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.
Patches
This is fixed in 5.28.5; 6.21.1; 7.2.3.
Workarounds
Do not issue multipart requests to attacker controlled servers.
References
NVD の説明
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.
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