CVE-2026-47089 Missing authorization in Cyrus IMAP
Authenticated users can improperly view access rights for any mailbox, exposing sensitive permission data to unauthorized parties.
- 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-2026-47089?
CVE-2026-47089 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. LISTRIGHTS os not limited to users with admin access. An authenticated user could call IMAP LISTRIGHTS against any mailbox they could name and learn what principals had what access to it. (This action should have been restricted to users with admin access on the target mailbox.)
Weakness: CWE-862
Which versions are affected by CVE-2026-47089?
How do I fix CVE-2026-47089?
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-2026-47089 being exploited?
There is no known exploitation of CVE-2026-47089 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-47089, GHSA-fx86-vr4x-grgq, UBUNTU-CVE-2026-47089.