CVE-2026-9546

A vulnerability in libcurl caused the HTTP `Referer:` header to persist even

when explicitly cleared. While the documentation states that passing NULL to

`CURLOPT_REFERER` suppresses the header, the option failed to clear the

internal state. As a result, the previous referrer string was erroneously

reused and sent in subsequent requests, potentially leaking sensitive

information to unintended servers.