{"id":"CVE-2026-61910","aliases":["DEBIAN-CVE-2026-61910","EUVD-2026-75130","GHSA-4rv6-f2p6-rhx5","UBUNTU-CVE-2026-61910","openSUSE-SU-2026:21929-1"],"status":"published","title":"An issue was discovered in Cyrus IMAP before 3.12.4. Mailbox/set let a sharee change a special...","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.)","severity":{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0019,"percentile":0.08777,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-863"],"published":"2026-09-09T00:00:00Z","modified":"2026-10-28T02:30:28Z","fixes":[{"ecosystem":"Debian:14","package":"cyrus-imapd","fixed_in":["3.12.4-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"cyrus-imapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.10.0-1","3.10.0~beta1-1","3.10.0~beta1-2","3.10.0~beta1-3","3.10.0~beta2-1","3.10.0~rc2-1","3.10.1-1","3.10.1-2","3.10.1-3","3.10.1-3~bpo12+1","3.10.2-1","3.10.2-1~bpo12+1","3.12.0-1","3.12.0-2","3.12.1-1","3.12.1-2","3.12.1-3","3.12.2-1","3.12.3-1","3.12.3-1~bpo13+1","3.12.3-2","3.12.3-3","3.12.3-4","3.12.4-1","3.6.1-4","3.6.1-4+deb12u1","3.6.1-4+deb12u2","3.6.1-4+deb12u3","3.6.1-4+deb12u4","3.6.1-4+deb12u5","3.8.0-1","3.8.0-2","3.8.0-3","3.8.0-4","3.8.0-5","3.8.0~beta1-1","3.8.0~beta2-1","3.8.0~rc1-1","3.8.1-1","3.8.1-1~bpo12+1","3.8.1-2","3.8.1-3","3.8.2-1","3.8.3-1","3.8.4-1"]},{"source":"osv","ecosystem":"Debian:13","package":"cyrus-imapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.10.2-1","3.10.2-1+deb13u1","3.10.2-1+deb13u2","3.12.0-1","3.12.0-2","3.12.1-1","3.12.1-2","3.12.1-3","3.12.2-1","3.12.3-1","3.12.3-1~bpo13+1","3.12.3-2","3.12.3-3","3.12.3-4","3.12.4-1"]},{"source":"osv","ecosystem":"Debian:14","package":"cyrus-imapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.12.4-1"}]}],"versions":["3.10.2-1","3.12.0-1","3.12.0-2","3.12.1-1","3.12.1-2","3.12.1-3","3.12.2-1","3.12.3-1","3.12.3-1~bpo13+1","3.12.3-2","3.12.3-3","3.12.3-4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"cyrus-imapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.5.10-3build1","2.5.10-3build2","2.5.10-3ubuntu1","2.5.10-3ubuntu1.1","2.5.10-3ubuntu1.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"cyrus-imapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.11-1","3.0.11-1build1","3.0.12-1","3.0.12-2","3.0.12-2ubuntu2","3.0.12-2ubuntu3","3.0.13-2ubuntu1","3.0.13-3ubuntu1","3.0.13-4ubuntu1","3.0.13-5","3.0.13-5ubuntu0.1~esm1","3.0.13-5ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"cyrus-imapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.6-2build1","3.4.2-2","3.4.2-2build1","3.4.3-2","3.4.3-3","3.4.3-3build2","3.4.3-3ubuntu0.1","3.4.3-3ubuntu0.1+esm1","3.4.3-3ubuntu0.3","3.4.3-3ubuntu0.3+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"cyrus-imapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.8.0-5","3.8.1-1","3.8.1-1build1","3.8.1-1build2","3.8.1-3","3.8.1-3build3","3.8.2-1","3.8.2-1ubuntu0.1~esm1","3.8.2-1ubuntu0.2","3.8.2-1ubuntu0.2+esm1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"cyrus-imapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.12.1-3","3.12.2-1","3.12.2-1build1","3.12.3-3build1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"cyrus-imapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.10.2-1","3.12.1-2","3.12.1-2build1","3.12.1-3"]},{"source":"osv","ecosystem":"openSUSE:Leap 16.0","package":"cyrus-imapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.8-bp160.1.1"}]}],"bundled":6}],"products":[{"vendor":"cyrus","product":"imap"},{"vendor":"cyrusimap","product":"cyrus imap"}],"references":[{"url":"https://cyrusimap.org","tags":["Product","web"]},{"url":"https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.4.html","tags":["Release Notes","web"]},{"url":"https://www.cyrusimap.org/3.12/imap/download/release-notes/3.10/x/3.10.4.html","tags":["Release Notes","web"]},{"url":"https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.html","tags":["Release Notes","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-61910","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4rv6-f2p6-rhx5"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61910.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-61910","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-61910","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-61910","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1279908","tags":["report"]},{"url":"https://bugzilla.suse.com/1279975","tags":["report"]},{"url":"https://bugzilla.suse.com/1279976","tags":["report"]},{"url":"https://bugzilla.suse.com/1279977","tags":["report"]},{"url":"https://bugzilla.suse.com/1279978","tags":["report"]},{"url":"https://bugzilla.suse.com/1279979","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2026-61907","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-61908","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-61909","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-61910","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-61911","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-61915","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-61910","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.)","status":"published","published":"2026-09-09T00:00:00Z","modified":"2026-09-14T15:41:32.279Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:19:53.786088Z"}],"euvd":[{"id":"EUVD-2026-75130","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.)","status":"published","published":"2026-09-09T00:00:00Z","modified":"2026-09-14T15:41:32Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-02T17:28:20.426868Z"}],"ghsa":[{"id":"GHSA-4rv6-f2p6-rhx5","title":"An issue was discovered in Cyrus IMAP before 3.12.4. Mailbox/set let a sharee change a special...","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.)","status":"published","published":"2026-09-09T21:31:56Z","modified":"2026-09-09T21:32:03Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T15:11:40.819612Z"}],"nvd":[{"id":"CVE-2026-61910","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.)","status":"published","published":"2026-09-09T20:18:36.663Z","modified":"2026-09-16T15:24:04.61Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N","level":"low","assessor":"secondary"},{"version":"3.1","score":5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:12:45.93749Z"}],"osv":[{"id":"CVE-2026-61910","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.)","status":"published","published":"2026-09-09T00:00:00Z","modified":"2026-10-28T02:30:28.539779562Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T15:45:12.933503Z"},{"id":"DEBIAN-CVE-2026-61910","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.)","status":"published","published":"2026-09-09T20:18:36.663Z","modified":"2026-10-01T03:03:28.908561588Z","cvss":[{"version":"3.1","score":5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:57.932517Z"},{"id":"UBUNTU-CVE-2026-61910","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.) 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.","status":"published","published":"2026-09-09T14:00:00Z","modified":"2026-10-17T12:59:15.336335474Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N","level":"low"},{"version":"3.1","score":5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T16:56:43.630667Z"},{"id":"openSUSE-SU-2026:21929-1","title":"Security update for cyrus-imapd","description":"This update for cyrus-imapd fixes the following issues:\n\nChanges in cyrus-imapd:\n\nUpdate to 3.8.8 (bugfix release):\n\n- CVE-2026-61907: JMAP snooze bypasses destination-mailbox ACL (bsc#1279908)\n- CVE-2026-61908: JMAP email-header blob ID out-of-bounds index (bsc#1279975)\n- CVE-2026-61909: CalDAV/CardDAV multiget bypasses per-href ACL (bsc#1279976)\n- CVE-2026-61910: Mailbox/set let sharee change special-use role on shared mailboxes (bsc#1279977)\n- CVE-2026-61911: Sieve mailbox existence oracle (bsc#1279978)\n- CVE-2026-61915: VPATCH BYPARAM double-free (bsc#1279979)\n","status":"published","published":"2026-09-22T15:42:33Z","modified":"2026-09-25T18:23:14.142636484Z","updated_at":"2026-11-02T16:58:42.426393Z"}]}}