CVE-2026-49940
Analyzed Analyzed - Analysis Complete
Net::CIDR::Set Perl Module Unicode IP Address Parsing Flaw

Publication date: 2026-06-04

Last updated on: 2026-06-08

Assigner: CPANSec

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.
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Meta Information
Published
2026-06-04
Last Modified
2026-06-08
Generated
2026-06-25
AI Q&A
2026-06-04
EPSS Evaluated
2026-06-23
NVD
CVE-2026-49940
EUVD
EUVD-2026-34297
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
rrwo net to 0.21 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-1289 The product receives an input value that is used as a resource identifier or other type of reference, but it does not validate or incorrectly validates that the input is equivalent to a potentially-unsafe value.
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Impact Analysis

Because the vulnerability allows network masks to accept larger networks due to improper parsing of Unicode digits, it could lead to incorrect network configurations.

This might result in unintended network access or exposure, potentially allowing attackers or unauthorized users to access network resources that should be restricted.

Executive Summary

The vulnerability in Net::CIDR::Set versions through 0.20 for Perl involves the acceptance of non-ASCII IP addresses and netmasks.

Specifically, Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers.

This improper parsing could allow network masks to accept larger networks than intended.

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