CVE-2026-64193 (GCVE-0-2026-64193)

Vulnerability from cvelistv5 – Published: 2026-07-20 17:54 – Updated: 2026-07-21 18:55
VLAI
Title
Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR
Summary
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-21 18:54 UTC
CWE
  • CWE-95 - Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
Assigner
CPANSec CNA under the redhat root
CNA scorecard C 62/100 over 369 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
NLNETLABS Net::DNS Affected: 0 , ≤ 1.55 (custom)
guessed Create a notification for this product.
Credits
Steffen Ullrich
Show details on NVD website
To clipboard 

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