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

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Summary

CVECVE-2026-49940
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-04 17:16:33 UTC
Updated2026-06-04 19:15:17 UTC
DescriptionNet::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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Problem Types: CWE-1289 | CWE-1289 CWE-1289 Improper Validation of Unsafe Equivalence in Input

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA RRWO NetCIDRSet affected 0.20 custom Not specified

References

ReferenceSourceLinkTags
nvd.nist.gov/vuln/detail/CVE-2025-40911 9b29abf9-4ab0-4765-b253-1875cd9b441e nvd.nist.gov
metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2026-05-13T00:00:00.000ZIssue reported to CPANSec
CNA2026-06-02T00:00:00.000ZNet::CIDR::Set version 0.21 released with fix

Solutions

CNA: Upgrade to version 0.21.

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