An issue was discovered in Cyrus IMAP before 3.12.4. There is a Sieve mailbox existence oracle. An authenticated user could install a Sieve script that probed whether another user's private mailbox existed, or read the value of shared mailbox annotations, by observing which fileinto branch fired during LMTP delivery.
Metrics
Affected Vendors & Products
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Wed, 09 Sep 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Cyrusimap
Cyrusimap cyrus Imap |
|
| Weaknesses | CWE-497 | |
| CPEs | cpe:2.3:a:cyrusimap:cyrus_imap:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Cyrusimap
Cyrusimap cyrus Imap |
|
| Metrics |
cvssV3_1
|
Wed, 09 Sep 2026 20:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | An issue was discovered in Cyrus IMAP before 3.12.4. There is a Sieve mailbox existence oracle. An authenticated user could install a Sieve script that probed whether another user's private mailbox existed, or read the value of shared mailbox annotations, by observing which fileinto branch fired during LMTP delivery. | |
| References |
|
Projects
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MITRE
Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-09-09T19:59:30.468Z
Reserved: 2026-07-13T00:00:00.000Z
Link: CVE-2026-61911
Vulnrichment
No data.
NVD
Status : Awaiting Analysis
Published: 2026-09-09T20:18:36.800
Modified: 2026-09-09T20:22:32.663
Link: CVE-2026-61911
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses