要点
- CVE-2026-47219 は find-my-way に影響する深刻度「高」 (CVSS 7.5) の脆弱性です。
- 今後30日間に悪用される確率（EPSS）：0.46%（全脆弱性の 40.1% より高い）。
- 対処：9.7.0 以降に更新してください。
概要
Impact
Remotely triggerable DoS in find-my-way when it is used with Node's HTTP/2 server.
The short version is that lookup() passes req.method into find(), and find() indexes this.trees[method]. Since this.trees is a normal object, HTTP/2 method values like constructor, toString, or __proto__ can resolve inherited object properties instead of returning undefined. The code then treats that value like a router node and crashes when it reaches currentNode.prefix.length.
Patches
Upgrade to v9.7.0.
Workarounds
Do not use find-my-way with HTTP/2 servers, or validate that the http method is valid beforehand.
NVD の説明
find-my-way is a framework-independent HTTP router that internally uses a Radix Tree and supports route parameters and wildcards. Versions prior to 9.7.0 are vulnerable to remotely triggerable DoS in find-my-way when it is used with Node's HTTP/2 server. The lookup() function passes req.method into find(), and find() indexes this.trees[method]. Since this.trees is a normal object, HTTP/2 method values like constructor, toString, or __proto__ can resolve inherited object properties instead of returning undefined. The code then treats that value like a router node and crashes when it reaches currentNode.prefix.length. This issue has been fixed in version 9.0.7.
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