CVE-2026-32627

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 products

Cpp-Httplib

Yhirose Cpp-httplib

< 0.37.2

Fix

Available

CVSS 3.1

8.7 HIGH

EPSS

0.2% (8th percentile)

Weakness

CWE-295

NVD status

Analyzed

Published

2026-03-13

No exploit for CVE-2026-32627 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.