# CVE-2026-45190: libnet-cidr-lite-perl: Net::CIDR::Lite versions before 0.24 for Perl does not properly validate IP address and CIDR mask inputs, which may a...

CVE-2026-45190 is fixed in 2 products on 1 platform, first by ALAS2023-2026-1732, released May 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-45190
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0031
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 10, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libnet-cidr-lite-perl Debian 12.15 (bookworm) | 0.22-3~deb12u2 | [DEBIAN-CVE-2026-45190](https://patchblox.com/security/data/fix/linux/debian-cve-2026-45190.md) | May 27, 2026 |
| Linux | libnet-cidr-lite-perl Debian 13.5 (trixie) | 0.22-3~deb13u2 | [DEBIAN-CVE-2026-45190](https://patchblox.com/security/data/fix/linux/debian-cve-2026-45190.md) | May 27, 2026 |
| Linux | libnet-cidr-lite-perl Debian 14 | 0.24-1 | [DEBIAN-CVE-2026-45190](https://patchblox.com/security/data/fix/linux/debian-cve-2026-45190.md) | May 27, 2026 |
| Linux | libnet-cidr-lite-perl Ubuntu 18.04.6 LTS (bionic) | 0.21-1ubuntu0.18.04.1~esm2 | [libnet-cidr-lite-perl 0.21-1ubuntu0.18.04.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnet-cidr-lite-perl-0.21-1ubuntu0.18.04.1-esm2.md) | Jun 24, 2026 |
| Linux | libnet-cidr-lite-perl Ubuntu 20.04 LTS (focal) | 0.21-2ubuntu0.1+esm2 | [libnet-cidr-lite-perl 0.21-2ubuntu0.1+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnet-cidr-lite-perl-0.21-2ubuntu0.1-esm2.md) | Jun 24, 2026 |
| Linux | libnet-cidr-lite-perl Ubuntu 22.04.1 LTS (jammy) | 0.22-1ubuntu0.2 | [libnet-cidr-lite-perl 0.22-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libnet-cidr-lite-perl-0.22-1ubuntu0.2.md) | Jun 24, 2026 |
| Linux | libnet-cidr-lite-perl Ubuntu 24.04.5 LTS (noble) | 0.22-2ubuntu0.24.04.2 | [libnet-cidr-lite-perl 0.22-2ubuntu0.24.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnet-cidr-lite-perl-0.22-2ubuntu0.24.04.2.md) | Jun 24, 2026 |
| Linux | libnet-cidr-lite-perl Ubuntu 25.10 (questing) | 0.22-2ubuntu0.25.10.2 | [libnet-cidr-lite-perl 0.22-2ubuntu0.25.10.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnet-cidr-lite-perl-0.22-2ubuntu0.25.10.2.md) | Jun 24, 2026 |
| Linux | libnet-cidr-lite-perl Ubuntu 26.04.1 LTS (resolute) | 0.22-2ubuntu0.26.04.2 | [libnet-cidr-lite-perl 0.22-2ubuntu0.26.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libnet-cidr-lite-perl-0.22-2ubuntu0.26.04.2.md) | Jun 14, 2026 |
| Linux | perl-Net-CIDR-Lite amzn 2023 | 0.22-8.amzn2023.0.2 | [ALAS2023-2026-1732](https://patchblox.com/security/data/fix/linux/alas2023-2026-1732.md) | May 25, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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