{"action":"Upgrade sendmail to 8.16.1-2 or later.","affected":[{"fixed":"8.16.1-2","introduced":"0"}],"component":"sendmail","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["8.16.1-2"],"id":"tcs_01M5NFT7NRS5VQX2ZD0PHQCTV5","modified_at":"2026-10-23T18:03:50.155507672Z","published_at":"2022-03-23T20:15:09.833Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-3618","https://security-tracker.debian.org/tracker/CVE-2021-3618"],"severity":{"label":"high","score":7.4},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-3618#Debian:14/sendmail","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-3618"}],"summary":"ALPACA is an application layer protocol content confusion attack, exploiting TLS servers implementing different protocols but using compatible certificates, such as multi-domain or wildcard certificat"}