CVE-2026-49942

Name	CVE-2026-49942
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libnet-cidr-set-perl (PTS)	bullseye	0.13-3	vulnerable
	bookworm	0.13-4	vulnerable
	trixie	0.15-1	vulnerable
	forky, sid	0.21-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libnet-cidr-set-perl	source	(unstable)	0.21-1

Notes

[trixie] - libnet-cidr-set-perl <no-dsa> (Minor issue)
[bookworm] - libnet-cidr-set-perl <no-dsa> (Minor issue)
[bullseye] - libnet-cidr-set-perl <postponed> (Minor issue)
https://lists.security.metacpan.org/cve-announce/msg/40702816/
https://github.com/robrwo/perl-Net-CIDR-Set/commit/875010b4217afe9a61cee519f0e0250847ecf699 (0.21)