high7.4
CVE-2026-33745
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 0.39.0, the cpp-httplib HTTP client forwards stored Basic Auth, Bearer Token, and Digest Auth credentials to arbitrary hosts when following cross-origin HTTP redirects (301/302/307/308). A malicious or compromised server can redirect the client to an attacker-controlled host, which then receives the plaintext credentials in the `Authorization` header. Version 0.39.0 fixes the issue.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Yhirose | Cpp-Httplib | before 0.39.0 |