CVE-2026-24469: Frustratedproton HTTP-Server

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

C++ HTTP Server is an HTTP/1.1 server built to handle client connections and serve HTTP requests. Versions 1.0 and below are vulnerable to Path Traversal via the RequestHandler::handleRequest method. This flaw allows an unauthenticated, remote attacker to read arbitrary files from the server's filesystem by crafting a malicious HTTP GET request containing ../ sequences. The application fails to sanitize the filename variable derived from the user-controlled URL path, directly concatenating it to the files_directory base path and enabling traversal outside the intended root. No patch was available at the time of publication.

Affected products

• Frustratedproton HTTP-Server: up to and including 1.0

Published 2026-01-24. Last modified 2026-06-17.