{"id":"CVE-2026-47088","aliases":["DEBIAN-CVE-2026-47088","EUVD-2026-45011","GHSA-f77j-qm5m-p6cw","UBUNTU-CVE-2026-47088","openSUSE-SU-2026:21368-1"],"status":"published","title":"An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in...","description":"An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the message's end in memory, and read into the heap, returning the read content to the user.","severity":{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00265,"percentile":0.18568,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-126"],"published":"2026-07-16T00:00:00Z","modified":"2026-10-25T09:47:29Z","fixes":[{"ecosystem":"Debian:12","package":"cyrus-imapd","fixed_in":["3.6.1-4+deb12u5"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"cyrus-imapd","fixed_in":["3.10.2-1+deb13u2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"cyrus-imapd","fixed_in":["3.12.3-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"cyrus-imapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.1-4+deb12u5"}]}],"versions":["3.6.1-4","3.6.1-4+deb12u1","3.6.1-4+deb12u2","3.6.1-4+deb12u3","3.6.1-4+deb12u4"]},{"source":"osv","ecosystem":"Debian:13","package":"cyrus-imapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.10.2-1+deb13u2"}]}],"versions":["3.10.2-1","3.10.2-1+deb13u1"]},{"source":"osv","ecosystem":"Debian:14","package":"cyrus-imapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.12.3-1"}]}],"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~bpo13+1"]},{"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":"3.8.7-bp160.1.1"}]}],"bundled":9}],"products":[{"vendor":"cyrusimap","product":"cyrus imap"}],"references":[{"url":"https://www.cyrusimap.org/imap/download/release-notes/index.html","tags":["report"]},{"url":"https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.3.html","tags":["report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47088"},{"url":"https://github.com/advisories/GHSA-f77j-qm5m-p6cw"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-47088","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-47088","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-47088","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1271617","tags":["report"]},{"url":"https://bugzilla.suse.com/1271618","tags":["report"]},{"url":"https://bugzilla.suse.com/1271619","tags":["report"]},{"url":"https://bugzilla.suse.com/1271620","tags":["report"]},{"url":"https://bugzilla.suse.com/1271621","tags":["report"]},{"url":"https://bugzilla.suse.com/1271622","tags":["report"]},{"url":"https://bugzilla.suse.com/1271623","tags":["report"]},{"url":"https://bugzilla.suse.com/1271624","tags":["report"]},{"url":"https://bugzilla.suse.com/1271625","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47081","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47082","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47083","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47084","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47085","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47086","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47087","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47088","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47089","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-47088","description":"An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the message's end in memory, and read into the heap, returning the read content to the user.","status":"published","published":"2026-07-16T00:00:00Z","modified":"2026-07-16T19:01:31.618Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-126"],"updated_at":"2026-11-02T13:36:40.478484Z"}],"euvd":[{"id":"EUVD-2026-45011","description":"An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the message's end in memory, and read into the heap, returning the read content to the user.","status":"published","published":"2026-07-16T00:00:00Z","modified":"2026-07-16T19:01:31Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-02T18:19:51.364603Z"}],"ghsa":[{"id":"GHSA-f77j-qm5m-p6cw","title":"An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in...","description":"An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the message's end in memory, and read into the heap, returning the read content to the user.","status":"published","published":"2026-07-16T21:30:37Z","modified":"2026-07-16T21:30:38Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-126"],"updated_at":"2026-11-02T15:09:34.599528Z"}],"nvd":[{"id":"CVE-2026-47088","description":"An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the message's end in memory, and read into the heap, returning the read content to the user.","status":"published","published":"2026-07-16T19:16:49.513Z","modified":"2026-10-24T20:10:00.137Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"secondary"}],"cwes":["CWE-126"],"updated_at":"2026-11-02T14:12:30.250437Z"}],"osv":[{"id":"DEBIAN-CVE-2026-47088","description":"An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the message's end in memory, and read into the heap, returning the read content to the user.","status":"published","published":"2026-07-16T19:16:49.513Z","modified":"2026-10-25T09:47:29.216545215Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-02T15:45:56.444225Z"},{"id":"UBUNTU-CVE-2026-47088","description":"An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the message's end in memory, and read into the heap, returning the read content to the user.","status":"published","published":"2026-07-16T19:16:00Z","modified":"2026-10-17T13:00:16.684601185Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-02T16:56:30.797112Z"},{"id":"openSUSE-SU-2026:21368-1","title":"Security update for cyrus-imapd","description":"This update for cyrus-imapd fixes the following issues:\n\nChanges in cyrus-imapd:\n\n- Update to 3.8.7 (bugfix release)\n- CVE-2026-47081: XAPPLEPUSHSERVICE folder existence oracle and push hijack (bsc#1271617)\n- CVE-2026-47083: ESEARCH cross-user content oracle (bsc#1271619)\n- CVE-2026-47082: Vacation \"fcc\" skips destination-mailbox ACL (bsc#1271618)\n- CVE-2026-47084: LOCALDELETE bypassed ACL checks (bsc#1271620)\n- CVE-2026-47085: URLAUTH token forgery via missing mboxkey (bsc#1271621)\n- CVE-2026-47086: GENURLAUTH issued tokens bypassing ACLs (bsc#1271622)\n- CVE-2026-47087: URLAUTH does not honor revoked authorizer access (bsc#1271623)\n- CVE-2026-47088: Heap exposure in nested MIME comment parsing (bsc#1271624)\n- CVE-2026-47089: LISTRIGHTS not limited to users with admin access (bsc#1271625)\n","status":"published","published":"2026-07-17T15:44:26Z","modified":"2026-07-19T13:15:06.586381849Z","updated_at":"2026-11-02T16:58:41.885092Z"}]}}