CPANSA-Net-CIDR-Set-2026-49940: Net-CIDR-Set vulnerability

Publisher	giterlizzi	Document category	csaf_security_advisory
Initial release date	2026-06-04T00:00:00	Engine	CSAF Perl Toolkit 0.26
Current release date	2026-06-04T00:00:00	Build Date
Current version	1	Status	final
CVSS v3.1 Base Score	6.5	Severity
Original language		Language	en
Also referred to

Vulnerability Description

Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks. Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.

Vulnerabilities

CVE-2026-49940

Vulnerability Description

Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks.

Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.

Weakness	CWE-1289 : Improper Validation of Unsafe Equivalence in Input

Product status

Known affected

Product

Score

Net-CIDR-Set less than 0.21

CVSS Version	CVSS Vector	CVSS Base Score	CVSS Base Severity
3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N	6.5	Medium

Fixed

Net-CIDR-Set greater than or equal 0.21

giterlizzi

Namespace: https://github.com/giterlizzi/

gdt@cpan.org

References

CPANSA-Net-CIDR-Set-2026-49940 JSON self
https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2026/cpansa-net-cidr-set-2026-49940.json
https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes external
https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes
https://nvd.nist.gov/vuln/detail/CVE-2025-40911 external
https://nvd.nist.gov/vuln/detail/CVE-2025-40911
CVE-2026-49940 (NVD) external
https://nvd.nist.gov/vuln/detail/CVE-2026-49940

Revision history

Version	Date of the revision	Summary of the revision
1	Thu Jun 4 00:00:00 2026	First release

Sharing rules

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