CVE-2026-49942

High

Description

Net::CIDR::Set versions through 0.20 for Perl did not validate network masks. The mask portion of a network mask could contain Unicode digits such as the Arabic-Indic One (U+0661), or non-digits, which were ignored. This could allow network masks to accept larger networks. Leading zeros were also accepted, but treated as decimal instead of octal. This could lead to confusion about what networks are acceptable.

SeverityHigh

CVSS7.3

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

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