CVE & CISA-KEV Catalog

CVE-2026-45190

MEDIUM
6.5
CVSS v3
NVD

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.

CWE-1289

How to fix

Remediation Available
libnet-cidr-lite-perlDebian
Fixed in:0.24-1CVE-2026-45190
libnet-cidr-lite-perlUbuntu
Fixed in:0.21-1ubuntu0.16.04.1~esm2USN-8453-1
Fixed in:0.21-1ubuntu0.18.04.1~esm2USN-8453-1
Fixed in:0.21-2ubuntu0.1+esm2USN-8453-1
Fixed in:0.22-1ubuntu0.2USN-8453-1
Fixed in:0.22-2ubuntu0.24.04.2USN-8453-1
Fixed in:0.22-2ubuntu0.25.10.2USN-8453-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityLow
AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Exploit Intelligence

0.31%probability of exploitation in 30 days
23rdpercentile

Low risk: more likely to be exploited than 23% of all known CVEs.

References

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Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-12.