CVE-2026-45191

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

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

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-05-10 21:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-07-24 13:10 UTC Last updatedMost recent change to the record

Details

Published

2026-05-10 21:16 UTC

Last modified

2026-07-24 13:10 UTC

Exploit probability

0.3% · EPSS, next 30 days

Weakness

CWE-1289

Record status

Deferred

Attack profile CVSS 3.1 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low