UBUNTU-CVE-2026-47088 (CVE-2026-47088)
Vulnerability from osv_ubuntu – Published: 2026-07-16 19:16 – Updated: 2026-10-17 09:44 – Source website
VLAI
Details
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
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cyrus-admin",
"binary_version": "2.5.10-3ubuntu1.1+esm1"
},
{
"binary_name": "cyrus-caldav",
"binary_version": "2.5.10-3ubuntu1.1+esm1"
},
{
"binary_name": "cyrus-clients",
"binary_version": "2.5.10-3ubuntu1.1+esm1"
},
{
"binary_name": "cyrus-common",
"binary_version": "2.5.10-3ubuntu1.1+esm1"
},
{
"binary_name": "cyrus-imapd",
"binary_version": "2.5.10-3ubuntu1.1+esm1"
},
{
"binary_name": "cyrus-murder",
"binary_version": "2.5.10-3ubuntu1.1+esm1"
},
{
"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",
"binary_version": "2.5.10-3ubuntu1.1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "cyrus-imapd",
"purl": "pkg:deb/ubuntu/cyrus-imapd@2.5.10-3ubuntu1.1+esm1?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.5.10-3build1",
"2.5.10-3build2",
"2.5.10-3ubuntu1",
"2.5.10-3ubuntu1.1",
"2.5.10-3ubuntu1.1+esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cyrus-admin",
"binary_version": "3.0.13-5ubuntu0.1~esm2"
},
{
"binary_name": "cyrus-caldav",
"binary_version": "3.0.13-5ubuntu0.1~esm2"
},
{
"binary_name": "cyrus-clients",
"binary_version": "3.0.13-5ubuntu0.1~esm2"
},
{
"binary_name": "cyrus-common",
"binary_version": "3.0.13-5ubuntu0.1~esm2"
},
{
"binary_name": "cyrus-imapd",
"binary_version": "3.0.13-5ubuntu0.1~esm2"
},
{
"binary_name": "cyrus-murder",
"binary_version": "3.0.13-5ubuntu0.1~esm2"
},
{
"binary_name": "cyrus-nntpd",
"binary_version": "3.0.13-5ubuntu0.1~esm2"
},
{
"binary_name": "cyrus-pop3d",
"binary_version": "3.0.13-5ubuntu0.1~esm2"
},
{
"binary_name": "cyrus-replication",
"binary_version": "3.0.13-5ubuntu0.1~esm2"
},
{
"binary_name": "libcyrus-imap-perl",
"binary_version": "3.0.13-5ubuntu0.1~esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "cyrus-imapd",
"purl": "pkg:deb/ubuntu/cyrus-imapd@3.0.13-5ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"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"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cyrus-admin",
"binary_version": "3.4.3-3ubuntu0.3+esm1"
},
{
"binary_name": "cyrus-caldav",
"binary_version": "3.4.3-3ubuntu0.3+esm1"
},
{
"binary_name": "cyrus-clients",
"binary_version": "3.4.3-3ubuntu0.3+esm1"
},
{
"binary_name": "cyrus-common",
"binary_version": "3.4.3-3ubuntu0.3+esm1"
},
{
"binary_name": "cyrus-imapd",
"binary_version": "3.4.3-3ubuntu0.3+esm1"
},
{
"binary_name": "cyrus-murder",
"binary_version": "3.4.3-3ubuntu0.3+esm1"
},
{
"binary_name": "cyrus-nntpd",
"binary_version": "3.4.3-3ubuntu0.3+esm1"
},
{
"binary_name": "cyrus-pop3d",
"binary_version": "3.4.3-3ubuntu0.3+esm1"
},
{
"binary_name": "cyrus-replication",
"binary_version": "3.4.3-3ubuntu0.3+esm1"
},
{
"binary_name": "libcyrus-imap-perl",
"binary_version": "3.4.3-3ubuntu0.3+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "cyrus-imapd",
"purl": "pkg:deb/ubuntu/cyrus-imapd@3.4.3-3ubuntu0.3+esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"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"
]
},
{
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "cyrus-imapd",
"purl": "pkg:deb/ubuntu/cyrus-imapd@3.8.2-1ubuntu0.2+esm1?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"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"
]
},
{
"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",
"binary_version": "3.12.3-3build1"
},
{
"binary_name": "cyrus-murder",
"binary_version": "3.12.3-3build1"
},
{
"binary_name": "cyrus-nntpd",
"binary_version": "3.12.3-3build1"
},
{
"binary_name": "cyrus-pop3d",
"binary_version": "3.12.3-3build1"
},
{
"binary_name": "cyrus-replication",
"binary_version": "3.12.3-3build1"
},
{
"binary_name": "libcyrus-imap-perl",
"binary_version": "3.12.3-3build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.10",
"name": "cyrus-imapd",
"purl": "pkg:deb/ubuntu/cyrus-imapd@3.12.3-3build1?arch=source\u0026distro=stonking"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.12.1-3",
"3.12.2-1",
"3.12.2-1build1",
"3.12.3-3build1"
]
},
{
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "cyrus-imapd",
"purl": "pkg:deb/ubuntu/cyrus-imapd@3.12.1-3?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.10.2-1",
"3.12.1-2",
"3.12.1-2build1",
"3.12.1-3"
]
}
],
"aliases": [],
"details": "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\u0027s end in memory, and read into the heap, returning the read content to the user.",
"id": "UBUNTU-CVE-2026-47088",
"modified": "2026-10-17T09:44:05Z",
"published": "2026-07-16T19:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-47088"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-47088"
},
{
"type": "REPORT",
"url": "https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.3.html"
},
{
"type": "REPORT",
"url": "https://www.cyrusimap.org/imap/download/release-notes/index.html"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-47088"
]
}
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