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.

Routine
CVSS
6.5
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0031
24th percentile

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

ProductFixed inFixReleased
Linux
libnet-cidr-lite-perl · Debian 12.15 (bookworm) 0.22-3~deb12u2 DEBIAN-CVE-2026-45190 May 27, 2026
libnet-cidr-lite-perl · Debian 13.5 (trixie) 0.22-3~deb13u2 DEBIAN-CVE-2026-45190 May 27, 2026
libnet-cidr-lite-perl · Debian 14 0.24-1 DEBIAN-CVE-2026-45190 May 27, 2026
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 Jun 24, 2026
libnet-cidr-lite-perl · Ubuntu 20.04 LTS (focal) 0.21-2ubuntu0.1+esm2 libnet-cidr-lite-perl 0.21-2ubuntu0.1+esm2 Jun 24, 2026
libnet-cidr-lite-perl · Ubuntu 22.04.1 LTS (jammy) 0.22-1ubuntu0.2 libnet-cidr-lite-perl 0.22-1ubuntu0.2 Jun 24, 2026
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 Jun 24, 2026
libnet-cidr-lite-perl · Ubuntu 25.10 (questing) 0.22-2ubuntu0.25.10.2 libnet-cidr-lite-perl 0.22-2ubuntu0.25.10.2 Jun 24, 2026
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 Jun 14, 2026
perl-Net-CIDR-Lite · amzn 2023 0.22-8.amzn2023.0.2 ALAS2023-2026-1732 May 25, 2026

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