9.9
Critical
CVE-2026-45372 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 0.44.0, when cpp-httplib's server parses an incoming request, it applies percent-decoding to every header value except Location and Referer. The validity check (is_field_value) is run before decoding, so encoded %0D%0A passes the check and is then expanded to a literal \r\n byte pair inside the stored header value. This vulnerability is fixed in 0.44.0.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| cpp-httplib 0.44 | earliest → < 0.44.0 | 0.44.0 |
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