# CVE-2026-61910: cyrus-imapd: An issue was discovered in Cyrus IMAP before 3.12.4

CVE-2026-61910 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.

- Web page: https://patchblox.com/security/cve/CVE-2026-61910
- Priority: Routine
- CVSS: 5.0 (medium)
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 9, 2026

## Description

An issue was discovered in Cyrus IMAP before 3.12.4. Mailbox/set let a sharee change a special-use role on shared mailboxes. An authenticated user with maySetKeywords on another user's mailbox could change that mailbox's specialuse annotation. This could allow the sharee to change the shared mailbox to perform the archived, snoozed, or other role, which might cause mail mail to be written to the shared mailbox, sharing more content than intended. (This is likely to be an unusual situation, made more unusual because if the target already has an non-shared mailbox with that role, role duplication suppression will prevent the update.)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | cyrus-imapd Debian 14 | 3.12.4-1 | [DEBIAN-CVE-2026-61910](https://patchblox.com/security/data/fix/linux/debian-cve-2026-61910.md) | Sep 17, 2026 |
| Linux | cyrus-imapd Fedora 43 | 3.10.4-1.fc43 | [FEDORA-2026-97A7EC5786](https://patchblox.com/security/data/fix/linux/fedora-2026-97a7ec5786.md) | Sep 14, 2026 |
| Linux | cyrus-imapd opensuse-leap 16.0 | 3.8.8-bp160.1.1 | [OPENSUSE-SU-2026:21929-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21929-1.md) | Sep 22, 2026 |
| Linux | cyrus-imapd-debuginfo Fedora 43 | 3.10.4-1.fc43 | [FEDORA-2026-97A7EC5786](https://patchblox.com/security/data/fix/linux/fedora-2026-97a7ec5786.md) | Sep 14, 2026 |
| Linux | cyrus-imapd-debugsource Fedora 43 | 3.10.4-1.fc43 | [FEDORA-2026-97A7EC5786](https://patchblox.com/security/data/fix/linux/fedora-2026-97a7ec5786.md) | Sep 14, 2026 |
| Linux | cyrus-imapd-devel Fedora 43 | 3.10.4-1.fc43 | [FEDORA-2026-97A7EC5786](https://patchblox.com/security/data/fix/linux/fedora-2026-97a7ec5786.md) | Sep 14, 2026 |
| Linux | cyrus-imapd-doc-extra Fedora 43 | 3.10.4-1.fc43 | [FEDORA-2026-97A7EC5786](https://patchblox.com/security/data/fix/linux/fedora-2026-97a7ec5786.md) | Sep 14, 2026 |
| Linux | cyrus-imapd-libs Fedora 43 | 3.10.4-1.fc43 | [FEDORA-2026-97A7EC5786](https://patchblox.com/security/data/fix/linux/fedora-2026-97a7ec5786.md) | Sep 14, 2026 |
| Linux | cyrus-imapd-libs-debuginfo Fedora 43 | 3.10.4-1.fc43 | [FEDORA-2026-97A7EC5786](https://patchblox.com/security/data/fix/linux/fedora-2026-97a7ec5786.md) | Sep 14, 2026 |
| Linux | cyrus-imapd-utils Fedora 43 | 3.10.4-1.fc43 | [FEDORA-2026-97A7EC5786](https://patchblox.com/security/data/fix/linux/fedora-2026-97a7ec5786.md) | Sep 14, 2026 |
| Linux | cyrus-imapd-utils-debuginfo Fedora 43 | 3.10.4-1.fc43 | [FEDORA-2026-97A7EC5786](https://patchblox.com/security/data/fix/linux/fedora-2026-97a7ec5786.md) | Sep 14, 2026 |
| Linux | cyrus-imapd-virusscan Fedora 43 | 3.10.4-1.fc43 | [FEDORA-2026-97A7EC5786](https://patchblox.com/security/data/fix/linux/fedora-2026-97a7ec5786.md) | Sep 14, 2026 |
| Linux | cyrus-imapd-virusscan-debuginfo Fedora 43 | 3.10.4-1.fc43 | [FEDORA-2026-97A7EC5786](https://patchblox.com/security/data/fix/linux/fedora-2026-97a7ec5786.md) | Sep 14, 2026 |
| Linux | perl-Cyrus Fedora 43 | 3.10.4-1.fc43 | [FEDORA-2026-97A7EC5786](https://patchblox.com/security/data/fix/linux/fedora-2026-97a7ec5786.md) | Sep 14, 2026 |
| Linux | perl-Cyrus-debuginfo Fedora 43 | 3.10.4-1.fc43 | [FEDORA-2026-97A7EC5786](https://patchblox.com/security/data/fix/linux/fedora-2026-97a7ec5786.md) | Sep 14, 2026 |

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Data as of 2026-11-10T01:44:33Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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