cyrus-imapd: An issue was discovered in Cyrus IMAP before 3.12.4
CVE-2026-61911 is fixed in 13 products on 1 platform, first by FEDORA-2026-97A7EC5786, released September 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| cyrus-imapd · Debian 14 | 3.12.4-1 | DEBIAN-CVE-2026-61911 | Sep 17, 2026 |
| cyrus-imapd · Fedora 43 | 3.10.4-1.fc43 | FEDORA-2026-97A7EC5786 | Sep 14, 2026 |
| cyrus-imapd · opensuse-leap 16.0 | 3.8.8-bp160.1.1 | OPENSUSE-SU-2026:21929-1 | Sep 22, 2026 |
| cyrus-imapd-debuginfo · Fedora 43 | 3.10.4-1.fc43 | FEDORA-2026-97A7EC5786 | Sep 14, 2026 |
| cyrus-imapd-debugsource · Fedora 43 | 3.10.4-1.fc43 | FEDORA-2026-97A7EC5786 | Sep 14, 2026 |
| cyrus-imapd-devel · Fedora 43 | 3.10.4-1.fc43 | FEDORA-2026-97A7EC5786 | Sep 14, 2026 |
| cyrus-imapd-doc-extra · Fedora 43 | 3.10.4-1.fc43 | FEDORA-2026-97A7EC5786 | Sep 14, 2026 |
| cyrus-imapd-libs · Fedora 43 | 3.10.4-1.fc43 | FEDORA-2026-97A7EC5786 | Sep 14, 2026 |
| cyrus-imapd-libs-debuginfo · Fedora 43 | 3.10.4-1.fc43 | FEDORA-2026-97A7EC5786 | Sep 14, 2026 |
| cyrus-imapd-utils · Fedora 43 | 3.10.4-1.fc43 | FEDORA-2026-97A7EC5786 | Sep 14, 2026 |
| cyrus-imapd-utils-debuginfo · Fedora 43 | 3.10.4-1.fc43 | FEDORA-2026-97A7EC5786 | Sep 14, 2026 |
| cyrus-imapd-virusscan · Fedora 43 | 3.10.4-1.fc43 | FEDORA-2026-97A7EC5786 | Sep 14, 2026 |
| cyrus-imapd-virusscan-debuginfo · Fedora 43 | 3.10.4-1.fc43 | FEDORA-2026-97A7EC5786 | Sep 14, 2026 |
| perl-Cyrus · Fedora 43 | 3.10.4-1.fc43 | FEDORA-2026-97A7EC5786 | Sep 14, 2026 |
| perl-Cyrus-debuginfo · Fedora 43 | 3.10.4-1.fc43 | FEDORA-2026-97A7EC5786 | Sep 14, 2026 |
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