CVE-2026-47081: Low severity Cyrus cyrus-imapd vulnerability
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-47081?
The severity of CVE-2026-47081 is classified as low with a score of 3.1.
How does CVE-2026-47081 exploit affect Cyrus IMAP users?
CVE-2026-47081 allows authenticated IMAP users to probe for the existence of arbitrary mailboxes of other users using the XAPPLEPUSHSERVICE command.
How can I mitigate CVE-2026-47081 in my Cyrus IMAP deployment?
To mitigate CVE-2026-47081, update your Cyrus IMAP version to a patched release that addresses this vulnerability.
What type of vulnerability is CVE-2026-47081 classified as?
CVE-2026-47081 is classified as an oracle and push hijack vulnerability, affecting mailbox visibility.
Is CVE-2026-47081 a remote or local vulnerability?
CVE-2026-47081 is a local vulnerability, as it requires authentication to exploit.