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CVE-2026-45190

6.5 · MEDIUM

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.

Published May 10, 2026CWE-1289EPSS 0.48%

Overview

CVE-2026-45190 is a medium-severity vulnerability. It was published on May 10, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/stigtsp/Net-CIDR-Lite/commit/ca9542adec87110556601d7ce48381ea8d13e692.patchRefmetacpan.org/release/STIGTSP/Net-CIDR-Lite-0.24/changesRefwww.cve.org/CVERecord?id=CVE-2026-45191

How CyberStrike helps

Frequently asked questions

What is CVE-2026-45190?

CVE-2026-45190 is a medium-severity vulnerability. It was published on May 10, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-45190?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-45190?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-45190?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-45190 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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