CVE-2026-24469
📋 TL;DR
CVE-2026-24469 is a path traversal vulnerability in C++ HTTP Server versions 1.0 and below that allows unauthenticated remote attackers to read arbitrary files from the server's filesystem. Attackers can exploit this by crafting malicious HTTP GET requests containing directory traversal sequences (../). All users running vulnerable versions of this HTTP server are affected.
💻 Affected Systems
- C++ HTTP Server
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise through reading sensitive files like configuration files, SSH keys, database credentials, or source code, potentially leading to further attacks.
Likely Case
Unauthorized access to sensitive files containing credentials, configuration data, or application source code, enabling data theft or further exploitation.
If Mitigated
Limited to reading files within the web root directory if proper input validation and path sanitization are implemented.
🎯 Exploit Status
Exploitation requires only crafting HTTP requests with path traversal sequences; no authentication or special privileges needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None
Vendor Advisory: https://github.com/frustratedProton/http-server/security/advisories/GHSA-qp54-6gfq-3gff
Restart Required: Yes
Instructions:
No official patch available. Consider migrating to alternative HTTP server software or implementing custom fixes with input validation.
🔧 Temporary Workarounds
Implement Input Validation Filter
allAdd server-side validation to reject requests containing path traversal sequences like ../ or absolute paths.
Modify RequestHandler::handleRequest method to sanitize filename variable before concatenation
Use Web Application Firewall (WAF)
allConfigure WAF rules to block HTTP requests containing path traversal patterns.
Add WAF rule: deny requests with '..' or '../' in URL path
🧯 If You Can't Patch
- Isolate the server in a restricted network segment with no access to sensitive files
- Implement strict file system permissions to limit what files the server process can read
🔍 How to Verify
Check if Vulnerable:
Check if running C++ HTTP Server version 1.0 or below by examining the server binary or configuration files.Check Version:
Check server documentation or run the server with --version flag if availableVerify Fix Applied:
Test with crafted HTTP GET requests containing ../ sequences; successful requests indicate vulnerability.📡 Detection & Monitoring
Log Indicators:
- HTTP GET requests containing '../' sequences in URL path
- Unusual file access patterns from web server process
Network Indicators:
- HTTP requests with encoded traversal sequences (%2e%2e%2f)
- Multiple failed attempts to access sensitive file paths
SIEM Query:
source="web_server_logs" AND (url="*../*" OR url="*..%2f*")