CVE-2026-32627 — cpp-httplib has a Silent TLS Certificate Verification Bypass on HTTPS Redirect via Proxy

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
yhirose / cpp-httplib	affected < 0.37.2

CWE

CWE-295

References

https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-c3h8-fqq4-xm4g

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.