{"action":"Upgrade cyrus-imapd to 3.12.4-1 or later.","affected":[{"fixed":"3.12.4-1","introduced":"0"}],"component":"cyrus-imapd","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["3.12.4-1"],"id":"tcs_01M5NT847RWF6NGCB8R1BY70R0","modified_at":"2026-10-01T03:03:28.793187999Z","published_at":"2026-09-09T20:18:36.523Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-61909","https://security-tracker.debian.org/tracker/CVE-2026-61909"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-61909#Debian:14/cyrus-imapd","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-61909"}],"summary":"An issue was discovered in Cyrus IMAP before 3.12.4. CalDAV/CardDAV multiget bypasses a per-href ACL. An authenticated DAV user with some shared access to another user's calendar or address book could"}