CVE-2025-58362
📋 TL;DR
This vulnerability in Hono web framework versions 4.8.0 through 4.9.5 allows path confusion attacks that could bypass proxy-level access controls like Nginx location blocks. Attackers could potentially access protected endpoints like /admin by crafting malformed absolute-form Request-URIs. Any application using affected Hono versions with proxy ACLs is vulnerable.
💻 Affected Systems
- Hono
📦 What is this software?
Hono by Hono
⚠️ Risk & Real-World Impact
Worst Case
Unauthorized access to sensitive administrative endpoints leading to data exposure, privilege escalation, or system compromise.
Likely Case
Bypass of proxy-level access controls allowing access to protected endpoints that should be restricted.
If Mitigated
Limited impact if application implements additional authentication/authorization layers beyond proxy ACLs.
🎯 Exploit Status
Exploitation requires crafting specific malformed URLs to trigger the path parsing flaw.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.9.6
Vendor Advisory: https://github.com/honojs/hono/security/advisories/GHSA-9hp6-4448-45g2
Restart Required: Yes
Instructions:
1. Update Hono dependency to version 4.9.6 or later. 2. Update package.json: "hono": "^4.9.6". 3. Run npm update or yarn update. 4. Restart the application.
🔧 Temporary Workarounds
Implement application-level authorization
allAdd authentication/authorization checks within the application code rather than relying solely on proxy ACLs.
Use WAF rules
allConfigure web application firewall to block malformed absolute-form Request-URIs.
🧯 If You Can't Patch
- Implement additional authentication layers at the application level for all protected endpoints
- Monitor logs for unusual access patterns to protected endpoints like /admin
🔍 How to Verify
Check if Vulnerable:
Check package.json or package-lock.json for Hono version between 4.8.0 and 4.9.5 inclusive.Check Version:
npm list hono or check package.json for "hono" versionVerify Fix Applied:
Verify Hono version is 4.9.6 or later in package.json and test that protected endpoints cannot be accessed via crafted URLs.📡 Detection & Monitoring
Log Indicators:
- Unusual access to protected endpoints like /admin
- HTTP requests with malformed absolute-form URLs
Network Indicators:
- HTTP requests containing crafted absolute-form Request-URIs
SIEM Query:
http.url contains "/admin" AND NOT user.role="admin" OR http.request_uri matches abnormal patterns