Non-ASCII IP Address Parsing Vulnerability in Net::CIDR::Set by Perl
CVE-2026-49940

6.5MEDIUM

Key Information:

Vendor

Rrwo

Status
Net::cidr::set
Vendor
CVE Published:
4 June 2026

What is CVE-2026-49940?

The Net::CIDR::Set module for Perl permits non-ASCII characters in IP addresses and network masks, specifically handling Unicode digits like the Arabic-Indic One (U+0661) without proper validation and parsing. This flaw could potentially allow the input of larger networks than intended, posing significant risks to network configurations and security protocols.

Affected Version(s)

Net::CIDR::Set 0 <= 0.20

References

https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes
release-notes
https://nvd.nist.gov/vuln/detail/CVE-2025-40911
related

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.