Unrated

UBUNTU-CVE-2026-61550

Type: advisorySource: OSV1 source record

Icinga 2 is an open source monitoring system. From 2.8 until 2.14.9, 2.15.4, and 2.16.2, certificate update JSON-RPC message handling does not validate that the sender is a trusted endpoint. An unauthenticated network attacker able to connect to TCP port 5665 can replace the node certificate and trusted CA certificate, impersonate a trusted node, and take control of the node. This issue is fixed in versions 2.14.9, 2.15.4, and 2.16.2.

Announced 18 Sept 2026Source revision 1

Original source ↗

UBUNTU-CVE-2026-61550

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:UBUNTU-CVE-2026-61550

icinga2

Source reference: /affected/0/package/name

Affected versions: 2.3.8-1build1
Source reference: /affected/0/versions
2.3.11-1
Source reference: /affected/0/versions
2.4.0-1
Source reference: /affected/0/versions
2.4.1-1
Source reference: /affected/0/versions
2.4.1-2
Source reference: /affected/0/versions
2.4.1-2ubuntu1
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

icinga2

Source reference: /affected/1/package/name

Affected versions: 2.7.0-1
Source reference: /affected/1/versions
2.8.1-0ubuntu2
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

icinga2

Source reference: /affected/2/package/name

Affected versions: 2.10.5-1build1
Source reference: /affected/2/versions
2.11.2-1
Source reference: /affected/2/versions
2.11.2-1ubuntu1
Source reference: /affected/2/versions
2.11.2-1ubuntu2
Source reference: /affected/2/versions
2.11.2-1ubuntu3
Source reference: /affected/2/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

icinga2

Source reference: /affected/3/package/name

Affected versions: 2.12.3-1
Source reference: /affected/3/versions
2.13.1-1
Source reference: /affected/3/versions
2.13.2-1
Source reference: /affected/3/versions
2.13.2-1build1
Source reference: /affected/3/versions
2.13.2-1build2
Source reference: /affected/3/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

icinga2

Source reference: /affected/4/package/name

Affected versions: 2.13.8-1
Source reference: /affected/4/versions
2.14.1-1
Source reference: /affected/4/versions
2.14.2-1
Source reference: /affected/4/versions
2.14.2-1build1
Source reference: /affected/4/versions
2.14.2-1build2
Source reference: /affected/4/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

icinga2

Source reference: /affected/5/package/name

Affected versions: 2.15.0-1
Source reference: /affected/5/versions
2.15.1-1
Source reference: /affected/5/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

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    "package": {
      "name": "icinga2",
      "purl": "pkg:deb/ubuntu/icinga2?arch=source&distro=xenial",
      "ecosystem": "Ubuntu:16.04:LTS"
    },
    "versions": [
      "2.3.8-1build1",
      "2.3.11-1",
      "2.4.0-1",
      "2.4.1-1",
      "2.4.1-2",
      "2.4.1-2ubuntu1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61550.json"
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    "ecosystem_specific": {
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          "binary_version": "2.4.1-2ubuntu1"
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          "binary_version": "2.4.1-2ubuntu1"
        },
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        {
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        },
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        },
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      "2.11.2-1",
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      "2.11.2-1ubuntu2",
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    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61550.json"
    },
    "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"
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      "purl": "pkg:deb/ubuntu/icinga2?arch=source&distro=jammy",
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    "versions": [
      "2.12.3-1",
      "2.13.1-1",
      "2.13.2-1",
      "2.13.2-1build1",
      "2.13.2-1build2"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61550.json"
    },
    "ecosystem_specific": {
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          "binary_name": "icinga2",
          "binary_version": "2.13.2-1build2"
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        {
          "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"
        }
      ]
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      "ecosystem": "Ubuntu:24.04:LTS"
    },
    "versions": [
      "2.13.8-1",
      "2.14.1-1",
      "2.14.2-1",
      "2.14.2-1build1",
      "2.14.2-1build2"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61550.json"
    },
    "ecosystem_specific": {
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          "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"
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      "purl": "pkg:deb/ubuntu/icinga2?arch=source&distro=resolute",
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    },
    "versions": [
      "2.15.0-1",
      "2.15.1-1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61550.json"
    },
    "ecosystem_specific": {
      "binaries": [
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          "binary_name": "icinga2",
          "binary_version": "2.15.1-1"
        },
        {
          "binary_name": "icinga2-bin",
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        },
        {
          "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"
        }
      ]
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #5803 · Revision 1
Added to Heist Feed: Sat, 24 Oct 2026 22:14:02 GMT
Publisher date: Fri, 18 Sep 2026 18:17:00 GMT

Read the original announcement