{"action":"Upgrade isync to 1.4.4-r0 or later.","affected":[{"fixed":"1.4.4-r0","introduced":"0"}],"component":"isync","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.19","exploited":false,"fixed_versions":["1.4.4-r0"],"id":"tcs_01M6GVBPRQSM3T26KYGD7G8W7P","modified_at":"2026-11-03T06:32:39.276985158Z","published_at":"2022-02-18T18:15:09.603Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2021-3657","https://security.alpinelinux.org/vuln/CVE-2021-3657"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2021-3657#Alpine:v3.19/isync","url":"https://osv.dev/vulnerability/ALPINE-CVE-2021-3657"}],"summary":"A flaw was found in mbsync versions prior to 1.4.4. Due to inadequate handling of extremely large (>=2GiB) IMAP literals, malicious or compromised IMAP servers, and hypothetically even external email"}