CVE-2026-46527 (GCVE-0-2026-46527)
Vulnerability from cvelistv5
Published
2026-05-29 19:18
Modified
2026-06-01 13:52
CWE
  • CWE-476 - NULL Pointer Dereference
Summary
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.44.0, When the server has called Server::set_trusted_proxies() with a non-empty trusted-proxy list, an attacker can send an HTTP request that includes an X-Forwarded-For header whose value parses to no valid IP segments. The code path then executes get_client_ip(), which calls front() on an empty std::vector—undefined behavior in C++. On typical implementations this manifests as abnormal process termination (denial of service). With Sanitizers enabled, you get an explicit runtime diagnostic. This vulnerability is fixed in 0.44.0.
Impacted products
Vendor Product Version
yhirose cpp-httplib Version: < 0.44.0
Create a notification for this product.
Show details on NVD website


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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