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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-64193 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://www.openwall.com/lists/oss-security/2026/07/20/12 CVE
https://metacpan.org/release/NLNETLABS/Net-DNS-1.55_01/changes CPANSec
https://rt.cpan.org/Ticket/Display.html?id=179945 CPANSec
https://www.net-dns.org/blog/#release-candidate-for-netdns-1.56 CPANSec

Weakness Enumeration

CWE-ID CWE Name Source
CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection') CPANSec  

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-64193
NVD Published Date:
07/20/2026
NVD Last Modified:
07/21/2026
Source:
CPANSec