cpp-httplib Untrusted HTTP Header Handling: X-Forwarded-For/X-Real-IP Trust
Summary
cpp-httplib Untrusted HTTP Header Handling: X-Forwarded-For/X-Real-IP Trust
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2025-66577 cpp-httplib
- Ubuntu UBUNTU-CVE-2025-66577 cpp-httplib Fixed in: 0.10.3+ds-1ubuntu0.1~esm1
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- patch github.com