CVE-2026-64193CWE-95

Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR

Critical · published July 20, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
73.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01439 · 73.0th percentile
Weakness
CWE-95 · Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
Published
2026-07-20T17:54Z
EPSS history
Timeline
  • 20 JUL 17:54Z
    Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR
    cvelistv5