CVE-2026-45191

6.5 mediumEPSS 0.3%

Medium (6.5). EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.5 medium

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-31)
CWE: CWE-1289
Published: 2026-05-10
Modified: 2026-07-24
Record from: the NVD, synced 2026-10-19

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

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