VDB
CVE-2026-33745
CVE-2026-33745
PUBLISHED
CVSS 7.400000095367432 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.
EPSS 0.27% · 18.6th percentile
Risk Scores
CVSS 3.1
7.400000095367432
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS Score
0.27%
18.6th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| yhirose | cpp-httplib | < 0.39.0, 0, * |
Timeline
- Mar 27, 2026 Coalition ESS Score
- Mar 27, 2026 CVE Published
- Mar 27, 2026 PoC Published
- Mar 28, 2026 EPSS Score
- Apr 1, 2026 CVE Updated
- Apr 4, 2026 PoC Published
- May 18, 2026 EPSS Score
- May 20, 2026 EPSS Score
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 24, 2026 EPSS Score
- May 25, 2026 EPSS Score