CVE-2026-54919 in cpp-httplib
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...
Quick answer
cpp-httplib should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- cpp-httplib >=0.31.0 <0.47.0
Fixed versions
- cpp-httplib 0.47.0 or later
How to fix it
Update cpp-httplib. The old HTTPS client can skip certificate checks in some builds.
- Upgrade yhirose/cpp-httplib to cpp-httplib 0.47.0 or later.
- Rebuild the app.
- Make sure certificate verification stays enabled.
- Retest HTTPS and WebSocket connections.
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Verify the fix
- Check the dependency version and confirm yhirose/cpp-httplib is fixed.
- Scan again and confirm CVE-2026-54919 is gone.
Related categories
Trusted references
FAQ
What is affected by CVE-2026-54919?
cpp-httplib versions listed as affected should be reviewed: cpp-httplib >=0.31.0 <0.47.0.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
How are Fixnx security risk categories chosen?
Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.