CVE-2026-47084: CWE-863 Incorrect Authorization in cyrusimap Cyrus IMAP
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. The LOCALDELETE command bypassed ACL checks. An authenticated but non-admin user could invoke the admin-only LOCALDELETE IMAP command and delete mailboxes for which they had no permissions.
AI Analysis
Technical Summary
The vulnerability in cyrus-imapd (Cyrus IMAP) up to version 3.12.2 involves incorrect authorization (CWE-863) in the LOCALDELETE command. Specifically, the command bypasses ACL checks, enabling authenticated users without administrative privileges to delete mailboxes they should not have access to. This flaw compromises the integrity of mailbox data by allowing unauthorized deletion.
Potential Impact
An authenticated user with non-admin privileges can delete mailboxes that they do not have permission to manage. This results in unauthorized modification of mailbox data (integrity impact) but does not affect confidentiality or availability according to the CVSS vector. The impact is limited to integrity loss without direct data disclosure or denial of service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, restrict access to trusted users only and monitor for suspicious use of the LOCALDELETE command.
CVE-2026-47084: CWE-863 Incorrect Authorization in cyrusimap Cyrus IMAP
Description
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. The LOCALDELETE command bypassed ACL checks. An authenticated but non-admin user could invoke the admin-only LOCALDELETE IMAP command and delete mailboxes for which they had no permissions.
CVSS v3.1
Score 6.5medium
Affected software
pkg:github/cyrusimap/cyrus-imapdRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in cyrus-imapd (Cyrus IMAP) up to version 3.12.2 involves incorrect authorization (CWE-863) in the LOCALDELETE command. Specifically, the command bypasses ACL checks, enabling authenticated users without administrative privileges to delete mailboxes they should not have access to. This flaw compromises the integrity of mailbox data by allowing unauthorized deletion.
Potential Impact
An authenticated user with non-admin privileges can delete mailboxes that they do not have permission to manage. This results in unauthorized modification of mailbox data (integrity impact) but does not affect confidentiality or availability according to the CVSS vector. The impact is limited to integrity loss without direct data disclosure or denial of service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, restrict access to trusted users only and monitor for suspicious use of the LOCALDELETE command.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-05-18T00:00:00.000Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a59276968715ace438892b7
Added to database: 07/16/2026, 18:48:09 UTC
Last enriched: 07/16/2026, 19:03:57 UTC
Last updated: 07/16/2026, 19:18:27 UTC
Views: 3
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