CVE-2026-32627
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library.
Impact
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.37.2, when a cpp-httplib client is configured with a proxy and set_follow_location(true), any HTTPS redirect it follows will have TLS certificate and hostname verification silently disabled on the new connection. The client will accept any certificate presented by the redirect target — expired, self-signed, or forged — without raising an error or notifying the application. A network attacker in a position to return a redirect response can fully intercept the follow-up HTTPS connection, including any credentials or session tokens in flight. This vulnerability is fixed in 0.37.2.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Yhirose | Cpp-Httplib | before 0.37.2 |