Improper Certificate Validation Affecting cpp-httplib package, versions <0.41.0+ds-3


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.18% (8th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-CPPHTTPLIB-15662604
  • published16 Mar 2026
  • disclosed16 Mar 2026

Introduced: 16 Mar 2026

CVE-2026-32627  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade Debian:unstable cpp-httplib to version 0.41.0+ds-3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cpp-httplib package and not the cpp-httplib package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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 Base Scores

version 3.1