Medium
cyrus-imapd — security advisory
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. The LOCALDELETE command bypassed ACL checks. An authenticated but non-admin user could invoke the admin-only LOCALDELETE IMAP command and delete mailboxes for which they had no permissions.
- Products
- cyrus-imapd
- Affected versions
- 2.5.10-3build1, 2.5.10-3build2, 2.5.10-3ubuntu1, 2.5.10-3ubuntu1.1, 2.5.10-3ubuntu1.1+esm1, 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, 3.10.2-1, 3.12.1-2, 3.12.1-2build1, 3.12.1-3, 3.12.2-1, 3.12.2-1build1, 3.12.3-3build1, 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, 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
- Fixed versions
- Not specified
- CVEs
- CVE-2026-47084
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:36 UTC · Revision 1
Source evidence
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. The LOCALDELETE command bypassed ACL checks. An authenticated but non-admin user could invoke the admin-only LOCALDELETE IMAP command and delete mailboxes for which they had no permissions.
osv:UBUNTU-CVE-2026-47084
cyrus-imapd
Fixed versions: Not specified
cyrus-imapd
Fixed versions: Not specified
cyrus-imapd
Fixed versions: Not specified
cyrus-imapd
Fixed versions: Not specified
cyrus-imapd
Fixed versions: Not specified
cyrus-imapd
Fixed versions: Not specified
Complete source record
{
"id": "dee3d67a9b362a74526472b181d76b433b2f4530a1c49f849ce1746b0f2c964e",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-47084",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-47084",
"summary": "An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. The LOCALDELETE command bypassed ACL checks. An authenticated but non-admin user could invoke the admin-only LOCALDELETE IMAP command and delete mailboxes for which they had no permissions.",
"evidence": "osv:UBUNTU-CVE-2026-47084",
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"affected_versions": [
{
"value": "3.8.0-5",
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},
{
"value": "3.8.1-1",
"evidence": "/affected/3/versions"
},
{
"value": "3.8.1-1build1",
"evidence": "/affected/3/versions"
},
{
"value": "3.8.1-1build2",
"evidence": "/affected/3/versions"
},
{
"value": "3.8.1-3",
"evidence": "/affected/3/versions"
},
{
"value": "3.8.1-3build3",
"evidence": "/affected/3/versions"
},
{
"value": "3.8.2-1",
"evidence": "/affected/3/versions"
},
{
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"evidence": "/affected/3/versions"
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{
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{
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"evidence": "/affected/3/versions"
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]
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "3.12.1-3",
"evidence": "/affected/4/versions"
},
{
"value": "3.12.2-1",
"evidence": "/affected/4/versions"
},
{
"value": "3.12.2-1build1",
"evidence": "/affected/4/versions"
},
{
"value": "3.12.3-3build1",
"evidence": "/affected/4/versions"
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},
{
"name": {
"value": "cyrus-imapd",
"evidence": "/affected/5/package/name"
},
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"affected_versions": [
{
"value": "3.10.2-1",
"evidence": "/affected/5/versions"
},
{
"value": "3.12.1-2",
"evidence": "/affected/5/versions"
},
{
"value": "3.12.1-2build1",
"evidence": "/affected/5/versions"
},
{
"value": "3.12.1-3",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-47084",
"aliases": [
"UBUNTU-CVE-2026-47084"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
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"events": [
{
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]
}
],
"package": {
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},
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"2.5.10-3build1",
"2.5.10-3build2",
"2.5.10-3ubuntu1",
"2.5.10-3ubuntu1.1",
"2.5.10-3ubuntu1.1+esm1"
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"database_specific": {
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},
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{
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{
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{
"binary_name": "cyrus-murder",
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},
{
"binary_name": "cyrus-nntpd",
"binary_version": "2.5.10-3ubuntu1.1+esm1"
},
{
"binary_name": "cyrus-pop3d",
"binary_version": "2.5.10-3ubuntu1.1+esm1"
},
{
"binary_name": "cyrus-replication",
"binary_version": "2.5.10-3ubuntu1.1+esm1"
},
{
"binary_name": "libcyrus-imap-perl",
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}
]
}
},
{
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"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
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"3.0.11-1build1",
"3.0.12-1",
"3.0.12-2",
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"3.0.13-2ubuntu1",
"3.0.13-3ubuntu1",
"3.0.13-4ubuntu1",
"3.0.13-5",
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],
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},
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{
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{
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},
{
"binary_name": "cyrus-pop3d",
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},
{
"binary_name": "cyrus-replication",
"binary_version": "3.4.3-3ubuntu0.3+esm1"
},
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"binary_version": "3.4.3-3ubuntu0.3+esm1"
}
]
}
},
{
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{
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],
"package": {
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"purl": "pkg:deb/ubuntu/cyrus-imapd?arch=source&distro=esm-apps%2Fnoble",
"ecosystem": "Ubuntu:Pro:24.04:LTS"
},
"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"
],
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},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cyrus-admin",
"binary_version": "3.8.2-1ubuntu0.2+esm1"
},
{
"binary_name": "cyrus-caldav",
"binary_version": "3.8.2-1ubuntu0.2+esm1"
},
{
"binary_name": "cyrus-clients",
"binary_version": "3.8.2-1ubuntu0.2+esm1"
},
{
"binary_name": "cyrus-common",
"binary_version": "3.8.2-1ubuntu0.2+esm1"
},
{
"binary_name": "cyrus-imapd",
"binary_version": "3.8.2-1ubuntu0.2+esm1"
},
{
"binary_name": "cyrus-murder",
"binary_version": "3.8.2-1ubuntu0.2+esm1"
},
{
"binary_name": "cyrus-nntpd",
"binary_version": "3.8.2-1ubuntu0.2+esm1"
},
{
"binary_name": "cyrus-pop3d",
"binary_version": "3.8.2-1ubuntu0.2+esm1"
},
{
"binary_name": "cyrus-replication",
"binary_version": "3.8.2-1ubuntu0.2+esm1"
},
{
"binary_name": "libcyrus-imap-perl",
"binary_version": "3.8.2-1ubuntu0.2+esm1"
}
]
}
},
{
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],
"package": {
"name": "cyrus-imapd",
"purl": "pkg:deb/ubuntu/cyrus-imapd?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
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"3.12.2-1",
"3.12.2-1build1",
"3.12.3-3build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47084.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cyrus-admin",
"binary_version": "3.12.3-3build1"
},
{
"binary_name": "cyrus-caldav",
"binary_version": "3.12.3-3build1"
},
{
"binary_name": "cyrus-clients",
"binary_version": "3.12.3-3build1"
},
{
"binary_name": "cyrus-common",
"binary_version": "3.12.3-3build1"
},
{
"binary_name": "cyrus-imapd",
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},
{
"binary_name": "cyrus-murder",
"binary_version": "3.12.3-3build1"
},
{
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},
{
"binary_name": "cyrus-pop3d",
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},
{
"binary_name": "cyrus-replication",
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},
{
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}
},
{
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],
"package": {
"name": "cyrus-imapd",
"purl": "pkg:deb/ubuntu/cyrus-imapd?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
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"3.12.1-2",
"3.12.1-2build1",
"3.12.1-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47084.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cyrus-admin",
"binary_version": "3.12.1-3"
},
{
"binary_name": "cyrus-caldav",
"binary_version": "3.12.1-3"
},
{
"binary_name": "cyrus-clients",
"binary_version": "3.12.1-3"
},
{
"binary_name": "cyrus-common",
"binary_version": "3.12.1-3"
},
{
"binary_name": "cyrus-imapd",
"binary_version": "3.12.1-3"
},
{
"binary_name": "cyrus-murder",
"binary_version": "3.12.1-3"
},
{
"binary_name": "cyrus-nntpd",
"binary_version": "3.12.1-3"
},
{
"binary_name": "cyrus-pop3d",
"binary_version": "3.12.1-3"
},
{
"binary_name": "cyrus-replication",
"binary_version": "3.12.1-3"
},
{
"binary_name": "libcyrus-imap-perl",
"binary_version": "3.12.1-3"
}
]
}
}
],
"modified": "2026-10-17T12:55:49.486200536Z",
"provider": "osv",
"upstream": [
"CVE-2026-47084"
],
"references": [
"https://ubuntu.com/security/CVE-2026-47084",
"https://www.cve.org/CVERecord?id=CVE-2026-47084",
"https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.3.html",
"https://www.cyrusimap.org/imap/download/release-notes/index.html"
]
},
"related_cves": [
{
"value": "CVE-2026-47084",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 354118,
"published_at": "2026-07-16T19:16:00+00:00"
}