{"action":"Upgrade isync to 1.4.4-1 or later.","affected":[{"fixed":"1.4.4-1","introduced":"0"}],"component":"isync","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1.4.4-1"],"id":"tcs_01M5NG1XJYPMHDSK7ASDTE4KBS","modified_at":"2026-10-23T18:04:16.855388541Z","published_at":"2021-11-22T20:15:18.223Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-44143","https://security-tracker.debian.org/tracker/CVE-2021-44143"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-44143#Debian:14/isync","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-44143"}],"summary":"A flaw was found in mbsync in isync 1.4.0 through 1.4.3. Due to an unchecked condition, a malicious or compromised IMAP server could use a crafted mail message that lacks headers (i.e., one that start"}