CVE-2026-45191

Net::CIDR::Lite versions before 0.24 for Perl does not properly consider extraneous zero characters in CIDR mask values, which may allow IP ACL bypass. Mask forms like "/00" and "/01" pass validation and parse to the same prefix as their unpadded value. See also CVE-2026-45190.

Score

CVSS 3.1 6.5 Medium

Status

Deferred - 9b29abf9-4ab0-4765-b253-1875cd9b441e

Published

2026-05-10

Last modified

2026-05-11

Weaknesses

CWE-1289

Affected products

• Netcidrlite (Stigtsp)

References

• https://github.com/stigtsp/Net-CIDR-Lite/commit/24e2c439ec405e5256024b9acefd4f7008c5ed0c.patch
• https://metacpan.org/release/STIGTSP/Net-CIDR-Lite-0.24/changes
• https://www.cve.org/CVERecord?id=CVE-2026-45190