CVE-2026-24472
📋 TL;DR
Hono web framework versions before 4.11.7 have a cache middleware vulnerability that improperly handles HTTP cache control directives. This allows private or authenticated responses to be cached and potentially exposed to unauthorized users. Any application using Hono's cache middleware with sensitive data is affected.
💻 Affected Systems
- Hono web framework
📦 What is this software?
Hono by Hono
⚠️ Risk & Real-World Impact
Worst Case
Sensitive authenticated user data (session tokens, personal information, private API responses) could be cached and exposed to other users accessing the same cache.
Likely Case
Some private user data may be cached and accessible to other users, potentially exposing limited personal information or session details.
If Mitigated
With proper cache controls at the infrastructure level or disabled cache middleware, impact is minimal.
🎯 Exploit Status
Exploitation requires access to shared cache storage and knowledge of cache keys.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.11.7
Vendor Advisory: https://github.com/honojs/hono/security/advisories/GHSA-6wqw-2p9w-4vw4
Restart Required: Yes
Instructions:
1. Update Hono package to version 4.11.7 or later. 2. Run 'npm update hono' or 'yarn upgrade hono'. 3. Restart your application server.
🔧 Temporary Workarounds
Disable Cache Middleware
allTemporarily disable Hono's cache middleware until patching is possible.
Remove or comment out cache middleware usage in your Hono application
Add Cache-Control Headers at Proxy Level
allConfigure reverse proxies or CDNs to override cache behavior.
🧯 If You Can't Patch
- Implement application-level cache control validation before responses are cached.
- Use separate cache instances per user or session to prevent cross-user data exposure.
🔍 How to Verify
Check if Vulnerable:
Check package.json for Hono version below 4.11.7 and verify cache middleware is used.Check Version:
npm list hono | grep honoVerify Fix Applied:
Confirm Hono version is 4.11.7 or higher and test that Cache-Control: private/no-store headers are respected.📡 Detection & Monitoring
Log Indicators:
- Multiple users accessing same cached resource IDs
- Unexpected cache hits for authenticated endpoints
Network Indicators:
- Cache-Control headers being ignored in responses
- Identical responses to different authenticated users
SIEM Query:
Search for cache middleware usage patterns with sensitive endpoints