CVE-2026-45191
6.5
MEDIUM
CVSS 3.1
EPSS 0.06%
Description
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.
How to fix CVE-2026-45191
To remediate CVE-2026-45191, upgrade the affected package to a fixed version below.
- Alpine/perl-net-cidr-lite—upgrade to 0.24-r0 or later
- —no fix listed
Is CVE-2026-45191 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 0.24-r0
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |