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.
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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Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-09-09T19:59:30.468Z
Reserved: 2026-07-13T00:00:00.000Z
Link: CVE-2026-61911
No data.
Status : Awaiting Analysis
Published: 2026-09-09T20:18:36.800
Modified: 2026-09-09T20:22:32.663
Link: CVE-2026-61911
No data.
OpenCVE Enrichment
No data.
Weaknesses