Vulnerability Description
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.37.2, when a cpp-httplib client is configured with a proxy and set_follow_location(true), any HTTPS redirect it follows will have TLS certificate and hostname verification silently disabled on the new connection. The client will accept any certificate presented by the redirect target — expired, self-signed, or forged — without raising an error or notifying the application. A network attacker in a position to return a redirect response can fully intercept the follow-up HTTPS connection, including any credentials or session tokens in flight. This vulnerability is fixed in 0.37.2.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Yhirose | Cpp-Httplib | < 0.37.2 |
Related Weaknesses (CWE)
References
- https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-c3h8-fqq4-xm4gExploitVendor Advisory
FAQ
What is CVE-2026-32627?
CVE-2026-32627 is a vulnerability with a CVSS score of 8.7 (HIGH). cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.37.2, when a cpp-httplib client is configured with a proxy and set_follow_location(true), any HTTPS redirec...
How severe is CVE-2026-32627?
CVE-2026-32627 has been rated HIGH with a CVSS base score of 8.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-32627?
Check the references section above for vendor advisories and patch information. Affected products include: Yhirose Cpp-Httplib.