CVE-2026-61907
Medium
Description
An issue was discovered in Cyrus IMAP before 3.12.4. JMAP snooze bypasses the destination-mailbox ACL. An authenticated user with insert permissions on another user's snoozed mailbox could cause insertion of mail to that user's inbox, or any other of their mailboxes whose id was known to the user, despite having no insert permissions to the target mailbox.
SeverityMedium
CVSS4.3
Exploit probability—
ProductCyrus IMAP
PublishedSep 9, 2026
First seenSep 9, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- cyrusimap Cyrus IMAP3.8.8, 3.10.4, 3.12.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cyrusimap Cyrus IMAP | v < 3.8.8, 3.9.0 ≤ v < 3.10.4, 3.11.0 ≤ v < 3.12.4 | 3.8.8, 3.10.4, 3.12.4 |
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