CVE-2026-47081
Low
Description
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is an XAPPLEPUSHSERVICE folder existence oracle and push hijack. An authenticated IMAP user could probe for the existence of arbitrary mailboxes on other users' accounts via the XAPPLEPUSHSERVICE command and then create Apple Push Notification Service notifications for new mail in those mailboxes to their own APNS device. This did not leak any data about the content of mailboxes. Instead, a "mailbox has changed" notice would be pushed when the mailbox modseq changed.
SeverityLow
CVSS3.1
Exploit probability—
ProductCyrus IMAP
PublishedJul 16, 2026
First seenJul 16, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- cyrusimap Cyrus IMAP3.12.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cyrusimap Cyrus IMAP | v < 3.12.3 | 3.12.3 |
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