Improper Certificate Validation Affecting cpp-httplib package, versions [0.39.0,0.47.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-CPPHTTPLIB-17950407
- published11 Jul 2026
- disclosed10 Jul 2026
- creditUnknown
Introduced: 10 Jul 2026
NewCVE-2026-54919 (opens in a new tab)How to fix?
Upgrade cpp-httplib to version 0.47.0 or higher.
Overview
Affected versions of this package are vulnerable to Improper Certificate Validation in the SSLClient and Client processes in HTTPS mode when connecting to an IP-literal host with server certificate verification enabled. An attacker can intercept and manipulate encrypted traffic by presenting a crafted certificate, potentially reading or modifying sensitive data in transit. This is only exploitable if the library is built with either CPPHTTPLIB_MBEDTLS_SUPPORT or CPPHTTPLIB_WOLFSSL_SUPPORT and connections are made to IP-literal hosts.