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

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Summary

CVECVE-2026-45190
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-10 21:16:29 UTC
Updated2026-05-10 21:16:29 UTC
DescriptionNet::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.

Risk And Classification

Problem Types: CWE-1289 | CWE-1289 CWE-1289 Improper Validation of Unsafe Equivalence in Input

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA STIGTSP NetCIDRLite affected 0.24 custom Not specified

References

ReferenceSourceLinkTags
metacpan.org/release/STIGTSP/Net-CIDR-Lite-0.24/changes 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
www.cve.org/CVERecord 9b29abf9-4ab0-4765-b253-1875cd9b441e www.cve.org
github.com/stigtsp/Net-CIDR-Lite/commit/ca9542adec87110556601d7ce48381ea... 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2026-05-10T00:00:00.000ZVulnerability found
CNA2026-05-10T00:00:00.000ZNet-CIDR-Lite version 0.24 released

Solutions

CNA: Upgrade to version 0.24 or newer, or apply the patch provided.

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