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Fencer Vulns
medium 6.5

CVE-2026-45190 json

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 2026-05-10 6 mo ago modified 2026-07-24 3 mo ago also EUVD-2026-28998

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

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.

Patch / fix

  • STIGTSP Net::CIDR::Lite 0.24
  • libnet-cidr-lite-perl Debian 12 0.22-3~deb12u2
  • libnet-cidr-lite-perl Debian 13 0.22-3~deb13u2
  • libnet-cidr-lite-perl Debian 14 0.24-1

debian advisories DEBIAN-CVE-2026-45190

  • libnet-cidr-lite-perl Ubuntu 22.04 LTS 0.22-1ubuntu0.2
  • libnet-cidr-lite-perl Ubuntu 24.04 LTS 0.22-2ubuntu0.24.04.2
  • libnet-cidr-lite-perl Ubuntu 25.10 0.22-2ubuntu0.25.10.2
  • libnet-cidr-lite-perl Ubuntu 26.04 LTS 0.22-2ubuntu0.26.04.2
  • libnet-cidr-lite-perl Ubuntu Pro 16.04 LTS 0.21-1ubuntu0.16.04.1~esm2
  • libnet-cidr-lite-perl Ubuntu Pro 18.04 LTS 0.21-1ubuntu0.18.04.1~esm2
  • libnet-cidr-lite-perl Ubuntu Pro 20.04 LTS 0.21-2ubuntu0.1+esm2

ubuntu advisories UBUNTU-CVE-2026-45190

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • perl-Net-CIDR-Lite openSUSE Tumbleweed 0.240.0-1.1

opensuse advisories openSUSE-SU-2026:10780-1

  • perl-net-cidr-lite Alpine 3.24 0.24-r0

alpine advisories ALPINE-CVE-2026-45190

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-45190 updated cvss 6.5

Net::CIDR::Lite: perl: Net::CIDR::Lite: IP ACL bypass due to improper input validation

  • Red Hat Enterprise Linux 6 perl, perl-CGI, perl-core, perl-CPAN, perl-libs, perl-parent, +39 more Red Hat Enterprise Linux 7 perl, perl-core, perl-CPAN, perl-libs, perl-tests, perl-macros, +11 more Red Hat Enterprise Linux 8 perl, perl-IO, perl-libs, perl-open, perl-Test, perl-Errno, +19 more Red Hat Enterprise Linux 9 perl, perl-B, perl-if, perl-IO, perl-ph, perl-lib, +92 more
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux 10 perl
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images perl
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Affected products

  • STIGTSP Net::CIDR::Lite

Classification

Weakness
  • CWE-1289 Improper Validation of Unsafe Equivalence in Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.