{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"libnet-cidr-perl","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":[],"id":"tcs_01M5NG28K2YRW105V7ZNXR1DJW","modified_at":"2026-10-23T18:05:23.375902686Z","published_at":"2026-02-27T01:16:13.553Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-4456","https://security-tracker.debian.org/tracker/CVE-2021-4456"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-4456","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-4456"}],"summary":"Net::CIDR versions before 0.24 for Perl mishandle leading zeros in IP CIDR addresses, which may have unspecified impact. The functions `addr2cidr` and `cidrlookup` may return leading zeros in a CIDR s"}