CVE-2026-47084 Missing authorization in Cyrus IMAP
Authenticated non-admin users can delete mailboxes they lack permissions for by bypassing ACL checks in the LOCALDELETE command.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-47084?
CVE-2026-47084 is a medium-severity missing authorization vulnerability in cyrusimap Cyrus IMAP, published on 16 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. The LOCALDELETE command bypassed ACL checks. An authenticated but non-admin user could invoke the admin-only LOCALDELETE IMAP command and delete mailboxes for which they had no permissions.
Weakness: CWE-863
Which versions are affected by CVE-2026-47084?
How do I fix CVE-2026-47084?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-47084 being exploited?
There is no known exploitation of CVE-2026-47084 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-47084, GHSA-324f-35v9-jxhh, UBUNTU-CVE-2026-47084.