CVE-2024-23340: @hono/node-server can't handle "double dots" in URL
Description
@hono/node-server is an adapter that allows users to run Hono applications on Node.js. Since v1.3.0, @hono/node-server has used its own Request object with `url` behavior that is unexpected. In the standard API, if the URL contains `..`, here called "double dots", the URL string returned by Request will be in the resolved path. However, the `url` in @hono/node-server's Request as does not resolve double dots, so `http://localhost/static/.. /foo.txt` is returned. This causes vulnerabilities when using `serveStatic`. Modern web browsers and a latest `curl` command resolve double dots on the client side, so this issue doesn't affect those using either of those tools. However, problems may occur if accessed by a client that does not resolve them. Version 1.4.1 includes the change to fix this issue. As a workaround, don't use `serveStatic`.
Classification
CVE ID: CVE-2024-23340
CVSS Base Severity: MEDIUM
CVSS Base Score: 5.3
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Problem Types
CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Affected Products
Vendor: honojs
Product: node-server
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.34% (probability of being exploited)
EPSS Percentile: 55.67% (scored less or equal to compared to others)
EPSS Date: 2025-06-16 (when was this score calculated)
Stakeholder-Specific Vulnerability Categorization (SSVC)
SSVC Exploitation: poc
SSVC Technical Impact: partial
SSVC Automatable: true
References
https://nvd.nist.gov/vuln/detail/CVE-2024-23340https://github.com/honojs/node-server/security/advisories/GHSA-rjq5-w47x-x359
https://github.com/honojs/node-server/commit/dd9b9a9b23e3896403c90a740e7f1f0892feb402
https://github.com/honojs/node-server/blob/8cea466fd05e6d2e99c28011fc0e2c2d3f3397c9/src/request.ts#L43-L45