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7.4
cpp-httplib Exposes Credentials in Redirects
CVE-2026-33745
Summary
The cpp-httplib library stores login credentials and sends them to any website it redirects to. This means a malicious site could steal your login information. Update to version 0.39.0 or later to fix the issue.
Original title
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 ...
Original description
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.
nvd CVSS3.1
7.4
Vulnerability type
CWE-200
Information Exposure
Published: 27 Mar 2026 · Updated: 27 Mar 2026 · First seen: 27 Mar 2026