CVE-2026-49940: CWE-1289 Improper Validation of Unsafe Equivalence in Input in RRWO Net::CIDR::Set
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.
AI Analysis
Technical Summary
The vulnerability involves improper validation of input equivalence in the Net::CIDR::Set Perl module, specifically allowing non-ASCII Unicode digits in IP addresses and netmasks. These Unicode digits are accepted but not correctly parsed as numeric values, which may lead to acceptance of network masks that are larger than expected. This is classified under CWE-1289 (Improper Validation of Unsafe Equivalence). No official remediation or patch information is currently available.
Potential Impact
The impact is that network masks could be incorrectly interpreted, potentially allowing larger network ranges than intended. This could affect applications relying on Net::CIDR::Set for IP range validation or filtering, possibly leading to incorrect network access controls or routing decisions. There are no known exploits in the wild, and no further impact details are provided.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should avoid using untrusted input containing non-ASCII Unicode digits in IP addresses or netmasks with Net::CIDR::Set. Monitoring for updates from the vendor or CPAN security advisories is recommended.
CVE-2026-49940: CWE-1289 Improper Validation of Unsafe Equivalence in Input in RRWO Net::CIDR::Set
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.
CVSS v3.1
Score 6.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability involves improper validation of input equivalence in the Net::CIDR::Set Perl module, specifically allowing non-ASCII Unicode digits in IP addresses and netmasks. These Unicode digits are accepted but not correctly parsed as numeric values, which may lead to acceptance of network masks that are larger than expected. This is classified under CWE-1289 (Improper Validation of Unsafe Equivalence). No official remediation or patch information is currently available.
Potential Impact
The impact is that network masks could be incorrectly interpreted, potentially allowing larger network ranges than intended. This could affect applications relying on Net::CIDR::Set for IP range validation or filtering, possibly leading to incorrect network access controls or routing decisions. There are no known exploits in the wild, and no further impact details are provided.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should avoid using untrusted input containing non-ASCII Unicode digits in IP addresses or netmasks with Net::CIDR::Set. Monitoring for updates from the vendor or CPAN security advisories is recommended.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CPANSec
- Date Reserved
- 2026-06-02T16:06:23.068Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a21ac6de29bf47b50b8bc21
Added to database: 6/4/2026, 4:48:45 PM
Last enriched: 6/4/2026, 5:03:54 PM
Last updated: 6/4/2026, 5:52:48 PM
Views: 2
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