CVE-2026-45191
perl-Net-CIDR-Lite: Net::CIDR::Lite: IP ACL bypass due to improper CIDR mask validation
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 11, 2026
Updated · June 28, 2026
Description
A flaw was found in Net::CIDR::Lite. This vulnerability allows an attacker to bypass IP Access Control Lists (ACLs) by providing specially crafted CIDR (Classless Inter-Domain Routing) mask values. The component incorrectly processes mask forms containing extraneous zero characters, such as "/00" or "/01", leading to an unintended bypass of network access restrictions. This could result in unauthorized access.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE-1389 · Incorrect Parsing of Numbers with Different Radices