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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.

PUBLISHED Reserved 2026-03-12 | Published 2026-03-13 | Updated 2026-03-13 | Assigner GitHub_M




HIGH: 8.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

Problem types

CWE-295: Improper Certificate Validation

Product status

< 0.37.2
affected

References

github.com/...ttplib/security/advisories/GHSA-c3h8-fqq4-xm4g

cve.org (CVE-2026-32627)

nvd.nist.gov (CVE-2026-32627)

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