CVE-2026-61907

Summary

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.

Affected Software

VendorProductVersion RangeStatus
cyrusimapCyrus IMAP0 < 3.8.8affected
cyrusimapCyrus IMAP3.9.0 < 3.10.4affected
cyrusimapCyrus IMAP3.11.0 < 3.12.4affected

Weaknesses

  • CWE-863: CWE-863 Incorrect Authorization

References