UBUNTU-CVE-2026-47088

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Source
https://ubuntu.com/security/CVE-2026-47088
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47088.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-47088
Upstream
  • CVE-2026-47088
Published
2026-07-16T19:16:00Z
Modified
2026-07-29T07:58:05Z
Severity
  • 3.1 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
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.

References

Affected packages

Ubuntu:Pro:18.04:LTS / cyrus-imapd

Package

Name
cyrus-imapd
Purl
pkg:deb/ubuntu/cyrus-imapd?arch=source&distro=esm-apps%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
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": "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47088.json"

Ubuntu:Pro:20.04:LTS / cyrus-imapd

Package

Name
cyrus-imapd
Purl
pkg:deb/ubuntu/cyrus-imapd?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
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": "3.0.13-5ubuntu0.1~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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47088.json"

Ubuntu:Pro:22.04:LTS / cyrus-imapd

Package

Name
cyrus-imapd
Purl
pkg:deb/ubuntu/cyrus-imapd?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
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": "3.4.3-3ubuntu0.3+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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47088.json"

Ubuntu:Pro:24.04:LTS / cyrus-imapd

Package

Name
cyrus-imapd
Purl
pkg:deb/ubuntu/cyrus-imapd?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
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": "3.8.2-1ubuntu0.2+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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47088.json"

Ubuntu:26.04:LTS / cyrus-imapd

Package

Name
cyrus-imapd
Purl
pkg:deb/ubuntu/cyrus-imapd?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.10.2-1
3.12.1-2
3.12.1-2build1
3.12.1-3

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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-47088.json"