Net::CIDR::Lite versions before 0.24 for Perl does not properly validate IP address and CIDR mask inputs, which may allow IP ACL bypass.

Inputs containing a trailing newline or non-ASCII digit characters pass the validators but are then re-encoded by the parser to a different address than the input string spelled. find() and bin_find() can match or miss addresses as a result.

Example:

my $cidr = Net::CIDR::Lite->new();
$cidr->add("::1\n/128");
$cidr->find("::1a"); # incorrectly returns true

See also CVE-2026-45191.

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Advisories

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Fixes

Solution

Upgrade to version 0.24 or newer, or apply the patch provided.


Workaround

No workaround given by the vendor.

History

Sun, 10 May 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Stigtsp
Stigtsp net::cidr::lite
Vendors & Products Stigtsp
Stigtsp net::cidr::lite

Sun, 10 May 2026 20:30:00 +0000

Type Values Removed Values Added
Description Net::CIDR::Lite versions before 0.24 for Perl does not properly validate IP address and CIDR mask inputs, which may allow IP ACL bypass. Inputs containing a trailing newline or non-ASCII digit characters pass the validators but are then re-encoded by the parser to a different address than the input string spelled. find() and bin_find() can match or miss addresses as a result. Example: my $cidr = Net::CIDR::Lite->new(); $cidr->add("::1\n/128"); $cidr->find("::1a"); # incorrectly returns true See also CVE-2026-45191.
Title Net::CIDR::Lite versions before 0.24 for Perl does not properly validate IP address and CIDR mask inputs, which may allow IP ACL bypass
Weaknesses CWE-1289
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published:

Updated: 2026-05-10T20:15:24.721Z

Reserved: 2026-05-10T16:36:05.708Z

Link: CVE-2026-45190

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-10T21:16:29.273

Modified: 2026-05-10T21:16:29.273

Link: CVE-2026-45190

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-10T21:23:22Z

Weaknesses