CVE-2026-49941

Name	CVE-2026-49941
Description	Net::CIDR::Set versions through 0.20 for Perl did not validate IP addresses. The add method called the _encode method to parse addresses. If the addresses did not look like netmasks or network ranges, then they were assumed to single IP addresses and passed back to itself as a 32-bit or 128-bit netmask. If the argument was not a well-formed IP address, then this would lead to indefinite recursion. An attacker could use this to cause a denial of service.
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	0.22-1	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/40702781/
https://github.com/robrwo/perl-Net-CIDR-Set/commit/3a40b4c0d0e8ef996ccb7aee1d5f108187431c2b (0.21)