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Medium severity6.5OSV Advisory· Published May 27, 2025· Updated Apr 15, 2026

CVE-2025-40911

CVE-2025-40911

Description

Net::CIDR::Set versions 0.10 through 0.13 for Perl does not properly handle 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.

Net::CIDR::Set used code from Net::CIDR::Lite, which had a similar vulnerability CVE-2021-47154.

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Affected products

1

Patches

Vulnerability mechanics

References

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