CVE-2026-33745
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
- Cpp-Httplib
- Yhirose Cpp-httplib
- < 0.39.0
- Fix
- Available
- CVSS 3.1
- 7.4 HIGH
- EPSS
- 0.3% (18th percentile)
- Weakness
- CWE-200
- NVD status
- Analyzed
- Published
- 2026-03-27
CVE-2026-33745 at NVD
No indexed exploits for CVE-2026-33745 yet
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No exploit for CVE-2026-33745 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.