What is CVE-2026-45191?

CVE-2026-45191 is a medium-severity vulnerability in Stigtsp Net::cidr::lite, classified under CWE-1289. CVSS score: 6.5/10. Published 2026-05-10.

How severe is CVE-2026-45191?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Stigtsp Net::cidr::lite

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…

EPSS: 0.001 (20.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: 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 — versions 0

Weakness classification (CWE)

CWE-1289

References

9b29abf9-4ab0-4765-b253-1875cd9b441e (patch)
9b29abf9-4ab0-4765-b253-1875cd9b441e (release-notes)
9b29abf9-4ab0-4765-b253-1875cd9b441e (related)

Frequently asked questions

What is CVE-2026-45191?: CVE-2026-45191 is a medium-severity vulnerability in Stigtsp Net::cidr::lite, classified under CWE-1289. CVSS score: 6.5/10. Published 2026-05-10.
How severe is CVE-2026-45191?: Medium severity. CVSS v3 base score is 6.5 out of 10.