CVE-2026-8450

HTTP::Daemon versions before 6.17 for Perl allow OS command injection via send_file().<br /> <br /> send_file() opens its string argument with Perl&amp;#39;s 2-arg open(). The 2-arg form interprets magic prefixes: &amp;#39;| cmd&amp;#39; and &amp;#39;cmd |&amp;#39; open a pipe to a subprocess, &amp;#39;&gt; path&amp;#39; and &amp;#39;&gt;&gt; path&amp;#39; open the path for write or append.<br /> <br /> Untrusted input passed to send_file() can run OS commands at the daemon process UID. The read-pipe form (&amp;#39;cmd |&amp;#39;) also leaks subprocess stdout into the HTTP response body. The write-mode forms can create or truncate files at attacker chosen paths.