low3.5
CVE-2026-61909
An issue was discovered in Cyrus IMAP before 3.12.4.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Cyrus | Imap | before 3.8.8 from 3.9.0 before 3.10.4 from 3.11.0 before 3.12.4 |