delvedor/find-my-way · Security
find-my-way: DDoS with HTTP2
- GHSA ID
- GHSA-c96f-x56v-gq3h
- CVE ID
- CVE-2026-47219
- Severity
- high
- Published
- Updated
- CVSS
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS v3
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
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.
CWEs
- CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
References
- https://github.com/delvedor/find-my-way/security/advisories/GHSA-c96f-x56v-gq3h ↗
- https://github.com/delvedor/find-my-way/pull/434 ↗
- https://github.com/delvedor/find-my-way/commit/cfe3fd6168b5ac1594c0820fb83fce251a533fc1 ↗
- https://github.com/delvedor/find-my-way/releases/tag/v9.7.0 ↗
- https://github.com/advisories/GHSA-c96f-x56v-gq3h ↗