delvedor find-my-way up to 9.6.x HTTP/2 lookup method input validation

Summaryinfo

A vulnerability identified as problematic has been detected in delvedor find-my-way up to 9.6.x. This affects the function lookup of the component HTTP2 Handler. The manipulation of the argument method leads to input validation. This vulnerability is traded as CVE-2026-47219. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in delvedor find-my-way up to 9.6.x. It has been rated as problematic. This issue affects the function lookup of the component HTTP2 Handler. The manipulation of the argument method with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-47219 since 05/19/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

Upgrading to version 9.7.0 eliminates this vulnerability.

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Productinfo

Vendor

• delvedor

Name

• find-my-way

Version

• 9.0
• 9.1
• 9.2
• 9.3
• 9.4
• 9.5
• 9.6

Website

• Product: https://github.com/delvedor/find-my-way/

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