cpp-httplib: cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library
CVE-2026-33745 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-33745, released March 27, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| cpp-httplib · Debian 14 | 0.41.0+ds-3 | DEBIAN-CVE-2026-33745 | Mar 27, 2026 |
| cpp-httplib · Fedora 43 | 0.48.0-1.fc43 | FEDORA-2026-1D4BD0354A | Jun 24, 2026 |
| cpp-httplib-devel · Fedora 43 | 0.48.0-1.fc43 | FEDORA-2026-1D4BD0354A | Jun 24, 2026 |
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