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CVE-2025-58362: Path Confusion Flaw in Hono Web Application Framework

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Overview

The Common Vulnerabilities and Exposures system has recently identified a flaw in the Hono Web application framework. This particular vulnerability, dubbed CVE-2025-58362, impacts versions 4.8.0 through 4.9.5 of the framework and can potentially allow bypass of proxy-level Access Control Lists (ACLs), such as Nginx location blocks, thus potentially compromising the system or leading to data leakage.

Vulnerability Summary

CVE ID: CVE-2025-58362
Severity: High (7.5 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage

Affected Products

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Product | Affected Versions

Hono Web Application Framework | 4.8.0 to 4.9.5

How the Exploit Works

The vulnerability resides in the getPath utility function of Hono’s Web application framework. It functions on the basis of fixed character offsets when parsing request URLs. Under certain conditions involving malformed absolute-form Request-URIs, incorrect path extraction might occur. This could potentially allow an attacker to bypass proxy ACLs that protect sensitive endpoints such as /admin, leading to unauthorized access to these endpoints.

Conceptual Example Code

The following example demonstrates a hypothetical request that could potentially exploit this vulnerability:

GET http://target.example.com/%2F..%2Fadmin HTTP/1.1
Host: target.example.com

In this example, a malformed Request-URI is used to potentially bypass the ACL protecting the /admin endpoint, thereby granting unauthorized access to it.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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