5.3
Medium
CVE-2025-66577 cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library
Description
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled HTTP headers to influence server-visible metadata, logging, and authorization decisions. An attacker can supply X-Forwarded-For or X-Real-IP headers which get accepted unconditionally by get_client_ip() in docker/main.cc, causing access and error logs (nginx_access_logger / nginx_error_logger) to record spoofed client IPs (log poisoning / audit evasion). This vulnerability is fixed in 0.27.0.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| cpp-httplib 0.27 | earliest → < 0.27.0 | 0.27.0 |
Other CVEs of cpp-httplib
The 24 CVEs of cpp-httplib →
CVE-2026-103930
cpp-httplib is a C++ header-only HTTP/HTTPS library
3.7
Low
CVE-2026-102944
cpp-httplib is a C++ header-only HTTP/HTTPS library
7.5
High
CVE-2026-77358
cpp-httplib is a C++ header-only HTTP/HTTPS library
8.2
High
CVE-2026-77341
cpp-httplib is a C++ header-only HTTP/HTTPS library
5.3
Medium