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TI-2026-45757 Aliases CVE-2026-64193GHSA-hwpr-jc4f-7ww3

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

Priority MEDIUM 52CWE-95Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-95.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01439 73rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
NLNETLABSNet::DNSup to 1.55—No fix listedCNA
  • Net::DNS VendorNLNETLABS Affected up to 1.55 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Critical. Red Hat's page for this CVE →

Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-64193
  2. 2026-10-03 Alias added: GHSA-hwpr-jc4f-7ww3

References

Other 3

  • TI-2023-27571 Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related… CVSS 3.1HIGH 7.5
  • TI-2019-15178 Unbound before 1.9.5 allows an integer overflow in a size calculation in… CVSS 3.1CRITICAL 9.8
  • TI-2026-25690 Possible arbitrary code execution during DNSSEC validation CVSS 4.0CRITICAL 9.1
  • TI-2026-56302 Heap buffer overflow and possible Remote Code Execution when digesting DNSKEY CVSS 4.0CRITICAL 9.1
  • TI-2019-15182 Unbound before 1.9.5 allows an out-of-bounds write via a compressed name in rdata_copy. CVSS 3.1CRITICAL 9.8
  • TI-2019-15179 Unbound before 1.9.5 allows an integer overflow in a size calculation in respip/respip.c. CVSS 3.1CRITICAL 9.8
See all 109 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences