Net::IP::LPM version 1.10 for Perl does not properly consider leading zero characters in IP CIDR address strings, which could allow attackers to bypass access control that is based on IP addresses.

Leading zeros are used to indicate octal numbers, which can confuse users who are intentionally using octal notation, as well as users who believe they are using decimal notation.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00293.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
unaffected
Version Status Constraints
1.10 affected —

No data.

No data.

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Project Subscriptions

No data.

Advisories
Source ID Title
EUVD EUVD EUVD-2025-19330 Net::IP::LPM version 1.10 for Perl does not properly consider leading zero characters in IP CIDR address strings, which could allow attackers to bypass access control that is based on IP addresses. Leading zeros are used to indicate octal numbers, which can confuse users who are intentionally using octal notation, as well as users who believe they are using decimal notation.
Fixes

Solution

Upgrade to Net::IP::LPM version 1.11 or later.

Workaround

Apply the patch.

References
Link Providers
https://blog.urth.org/2021/03/29/security-issues-in-perl-ip-address-distros/ cve-icon cve-icon
https://metacpan.org/release/RRWO/Net-IP-LPM-1.11/changes cve-icon cve-icon
https://metacpan.org/release/TPODER/Net-IP-LPM-1.10/diff/TPODER/Net-IP-LPM-1.09/lib/Net/IP/LPM.pm cve-icon cve-icon
https://rt.cpan.org/Ticket/Display.html?id=179855 cve-icon cve-icon
https://security.metacpan.org/patches/N/Net-IP-LPM/1.10/CVE-2025-40910-r1.patch cve-icon cve-icon
History

Mon, 07 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
References

Fri, 03 Jul 2026 13:15:00 +0000

Type Values Removed Values Added
References

Fri, 27 Jun 2025 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 27 Jun 2025 20:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

Fri, 27 Jun 2025 12:30:00 +0000

Type Values Removed Values Added
Description Net::IP::LPM version 1.10 for Perl does not properly consider leading zero characters in IP CIDR address strings, which could allow attackers to bypass access control that is based on IP addresses. Leading zeros are used to indicate octal numbers, which can confuse users who are intentionally using octal notation, as well as users who believe they are using decimal notation.
Title Net::IP::LPM version 1.10 for Perl does not properly consider leading zero characters in IP CIDR address strings, which could allow attackers to bypass access control that is based on IP addresses
Weaknesses CWE-1287
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published:

Updated: 2026-09-07T18:26:26.820Z

Reserved: 2025-04-16T09:05:34.361Z

Link: CVE-2025-40910

cve-icon Vulnrichment

Updated: 2025-06-27T20:06:35.262Z

cve-icon NVD

Status : Deferred

Published: 2025-06-27T13:15:24.667

Modified: 2026-09-07T19:17:24.773

Link: CVE-2025-40910

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses