cpp-httplib: cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library
CVE-2025-66577 is fixed in 4 products on 1 platform, first by libcpp-httplib0 0.10.3+ds-1ubuntu0.1~esm1, released December 5, 2025. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| cpp-httplib · Debian 14 | 0.41.0+ds-3 | DEBIAN-CVE-2025-66577 | Dec 5, 2025 |
| cpp-httplib · opensuse-leap 16.0 | 0.22.0-160000.3.1 | OPENSUSE-SU-2026:20056-1 | Jan 15, 2026 |
| cpp-httplib · sles 16.0 | 0.22.0-160000.3.1 | SUSE-SU-2026:20090-1 | Jan 15, 2026 |
| libcpp-httplib0 · Ubuntu 22.04.1 LTS (jammy) | 0.10.3+ds-1ubuntu0.1~esm1 | libcpp-httplib0 0.10.3+ds-1ubuntu0.1~esm1 | Dec 5, 2025 |
| libcpp-httplib0.14t64 · Ubuntu 24.04.5 LTS (noble) | 0.14.3+ds-1.1ubuntu0.1~esm1 | libcpp-httplib0.14t64 0.14.3+ds-1.1ubuntu0.1~esm1 | Dec 5, 2025 |
| libcpp-httplib0.18 · Ubuntu 25.10 (questing) | 0.18.7-1ubuntu0.25.10.1 | libcpp-httplib0.18 0.18.7-1ubuntu0.25.10.1 | Dec 5, 2025 |
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