CVE-2026-64193

Description

Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR. Net::DNS::RR::OPT::EXTENDED_ERROR::_decompose parses the EXTRA-TEXT field of an EDNS EXTENDED-ERROR option (RFC 8914) by tokenising the raw bytes and passing the result to Perl-s eval. There is some escaping done for $ and @, but not for backticks. This can be exploited for command execution if $pkt->edns->option(-EXTENDED-ERROR-) is called in array context, for example with a payload of {0:`-<command>-`} in EXTRA-TEXT.