CVE-2026-49940

Medium

Description

Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks. Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.

SeverityMedium

CVSS6.5

Exploit probability—

ProductRrwo Net\

PublishedJun 4, 2026

First seenJun 4, 2026

Weakness typeCWE-1289CWE-1289

How to fix

Update

rrwo net\0.21 or later

Vendor advisories

metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes

Affected products

Product	Affected versions	Fixed in
rrwo net\	\ ≤ v < 0.21	0.21

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.