CVE-2026-61909 [LOW] – An issue was discovered in Cyrus IMAP before 3.12.4. CalDAV/CardDAV multiget bypasses a pe

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 read even unshared events or contacts by including the target hrefs in a calendar-multiget or addressbook-multiget REPORT.