CVEvulnerability
CVE-2026-61911
4.3 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-09-09
- Last modified
- 2026-09-16
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Weaknesses
- CWE-497
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.
Affected configurations
• cyrus imap (< 3.8.8)
• cyrus imap (>= 3.9.0 < 3.10.4)
• cyrus imap (>= 3.11.0 < 3.12.4)
Related
Weakness · CWE (1)
- CWE-497 Exposure of Sensitive System Information to an Unauthorized Control Sphere weakness
References
- https://cyrusimap.org Product
- https://www.cyrusimap.org/3.12/imap/download/release-notes/3.10/x/3.10.4.html Release Notes
- https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.4.html Release Notes
- https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.html Release Notes