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.
References (2)
Core 2
Core References
Exploit, Third Party Advisory x_refsource_confirm
https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-gfpf-r66f-5mh2
Scores
CVSS v3
5.3
EPSS
0.0024
EPSS Percentile
14.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-807
CWE-117
Status
published
Products (1)
yhirose/cpp-httplib
< 0.27.0
Published
Dec 05, 2025
Tracked Since
Feb 18, 2026