CVE-2026-54919
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. In affected Mbed TLS backend versions from 0.31.0 through 0.46.1 and wolfSSL backend versions from 0.33.0 through 0.46.1, when cpp-httplib is built with CPPHTTPLIB_MBEDTLS_SUPPORT or CPPHTTPLIB_WOLFSSL_SUPPORT and a client connects to an IP-literal host with server certificate verification enabled, SSLClient and Client in HTTPS mode skip certificate chain validation and WebSocketClient on the Mbed TLS backend skips verification altogether, allowing a man-in-the-middle attacker positioned to intercept traffic to present a crafted certificate and read or modify the traffic. This issue is fixed in version 0.47.0.
- Affected products
- Cpp-Httplib
- Yhirose Cpp-httplib
- < 0.47.0
- Fix
- Available
- CVSS 3.1
- 7.4 HIGH
- EPSS
- 0.2% (6th percentile)
- Weakness
- CWE-295
- NVD status
- Analyzed
- Published
- 2026-07-10
No indexed exploits for CVE-2026-54919 yet
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No exploit for CVE-2026-54919 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.