UBUNTU-CVE-2026-61551

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Source
https://ubuntu.com/security/CVE-2026-61551
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61551.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-61551
Upstream
Published
2026-09-18T18:17:00Z
Modified
2026-09-24T02:00:36Z
Severity
  • 8.6 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Icinga 2 is an open source monitoring system. Prior to 2.14.9, 2.15.4, and 2.16.2, parsing deeply nested JSON can exhaust the call stack because nesting depth is not bounded. The affected JSON parsing paths are reachable by unauthenticated network clients through the Icinga 2 service on TCP port 5665, allowing a remote attacker to crash the process, while possible code execution has not been demonstrated. This issue is fixed in versions 2.14.9, 2.15.4, and 2.16.2.

References

Affected packages

Ubuntu:16.04:LTS
icinga2

Package

Name
icinga2
Purl
pkg:deb/ubuntu/icinga2?arch=source&distro=xenial

Affected ranges

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

Affected versions

2.*
2.3.8-1build1
2.3.11-1
2.4.0-1
2.4.1-1
2.4.1-2
2.4.1-2ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "icinga2",
            "binary_version": "2.4.1-2ubuntu1"
        },
        {
            "binary_name": "icinga2-bin",
            "binary_version": "2.4.1-2ubuntu1"
        },
        {
            "binary_name": "icinga2-classicui",
            "binary_version": "2.4.1-2ubuntu1"
        },
        {
            "binary_name": "icinga2-common",
            "binary_version": "2.4.1-2ubuntu1"
        },
        {
            "binary_name": "icinga2-ido-mysql",
            "binary_version": "2.4.1-2ubuntu1"
        },
        {
            "binary_name": "icinga2-ido-pgsql",
            "binary_version": "2.4.1-2ubuntu1"
        },
        {
            "binary_name": "icinga2-studio",
            "binary_version": "2.4.1-2ubuntu1"
        },
        {
            "binary_name": "libicinga2",
            "binary_version": "2.4.1-2ubuntu1"
        },
        {
            "binary_name": "vim-icinga2",
            "binary_version": "2.4.1-2ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61551.json"
Ubuntu:18.04:LTS
icinga2

Package

Name
icinga2
Purl
pkg:deb/ubuntu/icinga2?arch=source&distro=bionic

Affected ranges

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

Affected versions

2.*
2.7.0-1
2.8.1-0ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "icinga2",
            "binary_version": "2.8.1-0ubuntu2"
        },
        {
            "binary_name": "icinga2-bin",
            "binary_version": "2.8.1-0ubuntu2"
        },
        {
            "binary_name": "icinga2-classicui",
            "binary_version": "2.8.1-0ubuntu2"
        },
        {
            "binary_name": "icinga2-common",
            "binary_version": "2.8.1-0ubuntu2"
        },
        {
            "binary_name": "icinga2-ido-mysql",
            "binary_version": "2.8.1-0ubuntu2"
        },
        {
            "binary_name": "icinga2-ido-pgsql",
            "binary_version": "2.8.1-0ubuntu2"
        },
        {
            "binary_name": "icinga2-studio",
            "binary_version": "2.8.1-0ubuntu2"
        },
        {
            "binary_name": "libicinga2",
            "binary_version": "2.8.1-0ubuntu2"
        },
        {
            "binary_name": "vim-icinga2",
            "binary_version": "2.8.1-0ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61551.json"
Ubuntu:20.04:LTS
icinga2

Package

Name
icinga2
Purl
pkg:deb/ubuntu/icinga2?arch=source&distro=focal

Affected ranges

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

Affected versions

2.*
2.10.5-1build1
2.11.2-1
2.11.2-1ubuntu1
2.11.2-1ubuntu2
2.11.2-1ubuntu3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "icinga2",
            "binary_version": "2.11.2-1ubuntu3"
        },
        {
            "binary_name": "icinga2-bin",
            "binary_version": "2.11.2-1ubuntu3"
        },
        {
            "binary_name": "icinga2-common",
            "binary_version": "2.11.2-1ubuntu3"
        },
        {
            "binary_name": "icinga2-ido-mysql",
            "binary_version": "2.11.2-1ubuntu3"
        },
        {
            "binary_name": "icinga2-ido-pgsql",
            "binary_version": "2.11.2-1ubuntu3"
        },
        {
            "binary_name": "vim-icinga2",
            "binary_version": "2.11.2-1ubuntu3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61551.json"
Ubuntu:22.04:LTS
icinga2

Package

Name
icinga2
Purl
pkg:deb/ubuntu/icinga2?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*
2.12.3-1
2.13.1-1
2.13.2-1
2.13.2-1build1
2.13.2-1build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "icinga2",
            "binary_version": "2.13.2-1build2"
        },
        {
            "binary_name": "icinga2-bin",
            "binary_version": "2.13.2-1build2"
        },
        {
            "binary_name": "icinga2-common",
            "binary_version": "2.13.2-1build2"
        },
        {
            "binary_name": "icinga2-ido-mysql",
            "binary_version": "2.13.2-1build2"
        },
        {
            "binary_name": "icinga2-ido-pgsql",
            "binary_version": "2.13.2-1build2"
        },
        {
            "binary_name": "vim-icinga2",
            "binary_version": "2.13.2-1build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61551.json"
Ubuntu:24.04:LTS
icinga2

Package

Name
icinga2
Purl
pkg:deb/ubuntu/icinga2?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
2.13.8-1
2.14.1-1
2.14.2-1
2.14.2-1build1
2.14.2-1build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "icinga2",
            "binary_version": "2.14.2-1build2"
        },
        {
            "binary_name": "icinga2-bin",
            "binary_version": "2.14.2-1build2"
        },
        {
            "binary_name": "icinga2-common",
            "binary_version": "2.14.2-1build2"
        },
        {
            "binary_name": "icinga2-ido-mysql",
            "binary_version": "2.14.2-1build2"
        },
        {
            "binary_name": "icinga2-ido-pgsql",
            "binary_version": "2.14.2-1build2"
        },
        {
            "binary_name": "vim-icinga2",
            "binary_version": "2.14.2-1build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61551.json"
Ubuntu:26.04:LTS
icinga2

Package

Name
icinga2
Purl
pkg:deb/ubuntu/icinga2?arch=source&distro=resolute

Affected ranges

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

Affected versions

2.*
2.15.0-1
2.15.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "icinga2",
            "binary_version": "2.15.1-1"
        },
        {
            "binary_name": "icinga2-bin",
            "binary_version": "2.15.1-1"
        },
        {
            "binary_name": "icinga2-common",
            "binary_version": "2.15.1-1"
        },
        {
            "binary_name": "icinga2-ido-mysql",
            "binary_version": "2.15.1-1"
        },
        {
            "binary_name": "icinga2-ido-pgsql",
            "binary_version": "2.15.1-1"
        },
        {
            "binary_name": "vim-icinga2",
            "binary_version": "2.15.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61551.json"