{"action":"Upgrade libnet-cidr-lite-perl to 0.22-3~deb12u1 or later.","affected":[{"fixed":"0.22-3~deb12u1","introduced":"0"}],"component":"libnet-cidr-lite-perl","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["0.22-3~deb12u1"],"id":"tcs_01M5NRXCC5FA95C1ZWDHJK1WGF","modified_at":"2026-10-27T09:47:33.781945962Z","published_at":"2026-04-10T22:16:21.597Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-40199","https://security-tracker.debian.org/tracker/CVE-2026-40199"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-40199","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-40199"}],"summary":"Net::CIDR::Lite versions before 0.23 for Perl mishandles IPv4 mapped IPv6 addresses, which may allow IP ACL bypass. _pack_ipv6() includes the sentinel byte from _pack_ipv4() when building the packed r"}