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CVE Vulnerability Details :
CVE-2026-64193
PUBLISHED
More InfoOfficial Page
Assigner-CPANSec
Assigner Org ID-9b29abf9-4ab0-4765-b253-1875cd9b441e
View Known Exploited Vulnerability (KEV) details
Published At-20 Jul, 2026 | 17:54
Updated At-20 Jul, 2026 | 20:30
Rejected At-
▼CVE Numbering Authority (CNA)
Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR

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.

Affected Products
Vendor
NLNETLABS
Product
Net::DNS
Collection URL
https://cpan.org/modules
Package Name
Net-DNS
Repo
https://www.net-dns.org/svn/net-dns/
Program Files
  • lib/Net/DNS/RR/OPT.pm
Program Routines
  • Net::DNS::RR::OPT::EXTENDED_ERROR::_decompose
Default Status
unaffected
Versions
Affected
  • From 0 through 1.55 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-95CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
Type: CWE
CWE ID: CWE-95
Description: CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Upgrade to version 1.56 or later.

Configurations
Workarounds
Exploits
Credits
reporter
Steffen Ullrich
Timeline
EventDate
Issue reported publicly via RT.2026-07-10 00:00:00
Version 1.55_01 (release candidate for version 1.56) published on CPAN.2026-07-10 00:00:00
Version 1.56 published on CPAN.2026-07-18 00:00:00
Event: Issue reported publicly via RT.
Date: 2026-07-10 00:00:00
Event: Version 1.55_01 (release candidate for version 1.56) published on CPAN.
Date: 2026-07-10 00:00:00
Event: Version 1.56 published on CPAN.
Date: 2026-07-18 00:00:00
Replaced By
Rejected Reason
References
HyperlinkResource
https://www.net-dns.org/blog/#release-candidate-for-netdns-1.56
N/A
https://rt.cpan.org/Ticket/Display.html?id=179945
issue-tracking
https://metacpan.org/release/NLNETLABS/Net-DNS-1.55_01/changes
release-notes
Hyperlink: https://www.net-dns.org/blog/#release-candidate-for-netdns-1.56
Resource: N/A
Hyperlink: https://rt.cpan.org/Ticket/Display.html?id=179945
Resource:
issue-tracking
Hyperlink: https://metacpan.org/release/NLNETLABS/Net-DNS-1.55_01/changes
Resource:
release-notes
▼Authorized Data Publishers (ADP)
CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
http://www.openwall.com/lists/oss-security/2026/07/20/12
N/A
Hyperlink: http://www.openwall.com/lists/oss-security/2026/07/20/12
Resource: N/A
Details not found