Bug 2501453 (CVE-2026-47081) - CVE-2026-47081 cyrus-imapd: Cyrus IMAP: Information disclosure of mailbox existence via XAPPLEPUSHSERVICE command
Summary: CVE-2026-47081 cyrus-imapd: Cyrus IMAP: Information disclosure of mailbox exi...
Keywords:
Status: NEW
Alias: CVE-2026-47081
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2501664
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-16 19:01 UTC by OSIDB Bzimport
Modified: 2026-07-17 03:47 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-07-16 19:01:45 UTC 
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.
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