CVE-2026-61907

cyrus-imapd: cyrus-imapd: JMAP snooze bypasses destination-mailbox ACL

Published Sep 9, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-284
Type Values Removed Values Added
Description No description is available for this CVE. 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.
First Time appeared Cyrusimap
Cyrusimap cyrus Imap
Weaknesses CWE-863
CPEs cpe:2.3:a:cyrusimap:cyrus_imap:*:*:*:*:*:*:*:*
Vendors & Products Cyrusimap
Cyrusimap cyrus Imap
References
Type Values Removed Values Added
Weaknesses CWE-284
Type Values Removed Values Added
Description No description is available for this CVE.
Title cyrus-imapd: cyrus-imapd: JMAP snooze bypasses destination-mailbox ACL
References
Metrics threat_severity

None

cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}

threat_severity

Moderate

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Sep 14, 2026, 3:41 PM
Reserved
Jul 13, 2026, 12:00 AM
Status
Deferred
Published
Sep 9, 2026, 7:17 PM
Modified
Sep 14, 2026, 4:17 PM
Severity
Moderate
Public date
Sep 9, 2026, 8:02 AM