CVE-2026-61550

Source
https://cve.org/CVERecord?id=CVE-2026-61550
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61550.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-61550
Aliases
  • GHSA-vj39-ww8j-vvx5
Downstream
Published
2026-09-18T17:21:18Z
Modified
2026-10-28T11:18:18Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
Icinga 2: Improper access control for JSON-RPC update certificate messages
Details

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.

Database specific
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-862"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61550.json"
}
References

Affected packages

Git / github.com/icinga/icinga2

Affected ranges

Type
GIT
Repo
https://github.com/icinga/icinga2
Events
Database specific
Show details
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "2.8"
                },
                {
                    "fixed":  "2.14.9"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "introduced":  "2.15.0"
                },
                {
                    "fixed":  "2.15.4"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "introduced":  "2.16.0"
                },
                {
                    "fixed":  "2.16.2"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "4b7fb3405f4616a24b2b55e20f603a56b7dd6ad0"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "range":  [
                {
                    "fixed":  "6c2e0db3819f859910a4ae265461cb51b1d2039c"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "range":  [
                {
                    "fixed":  "a6f7cc7a4ef8beed023b24416106822d6940c4c0"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "range":  [
                {
                    "fixed":  "d37b0cfd7d9595ae2f02fadb3d724c98d8620f81"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v2.14.9",
            "range":  [
                {
                    "fixed":  "75b2d7a1c9eacb58e3e3025a6e5f4f573f922d23"
                }
            ],
            "source":  "REFERENCES_TAG"
        },
        {
            "original_tag":  "v2.15.4",
            "range":  [
                {
                    "fixed":  "b4ec974518c9e5f5ca861169442ac3780e675767"
                }
            ],
            "source":  "REFERENCES_TAG"
        },
        {
            "original_tag":  "v2.16.2",
            "range":  [
                {
                    "fixed":  "cfdf63b6331c73fecb2de433022e950cf5184d02"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

v2.*
v2.15.0
v2.15.3
v2.16.0
v2.16.1

Database specific

source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61550.json"
vanir_signatures
[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "210664276016879271991729067461967263691",
                "60084191526426145694823184325138172049",
                "157057593243643149005984172489367373276",
                "270408842380583503830298287509521390260"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-61550-1e1262bd",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/icinga/icinga2/commit/4b7fb3405f4616a24b2b55e20f603a56b7dd6ad0",
        "target":  {
            "file":  "lib/remote/jsonrpcconnection-pki.cpp"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "210664276016879271991729067461967263691",
                "60084191526426145694823184325138172049",
                "157057593243643149005984172489367373276",
                "270408842380583503830298287509521390260"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-61550-7a19d303",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/icinga/icinga2/commit/d37b0cfd7d9595ae2f02fadb3d724c98d8620f81",
        "target":  {
            "file":  "lib/remote/jsonrpcconnection-pki.cpp"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "210664276016879271991729067461967263691",
                "60084191526426145694823184325138172049",
                "157057593243643149005984172489367373276",
                "270408842380583503830298287509521390260"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-61550-808f5f66",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/icinga/icinga2/commit/6c2e0db3819f859910a4ae265461cb51b1d2039c",
        "target":  {
            "file":  "lib/remote/jsonrpcconnection-pki.cpp"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "210664276016879271991729067461967263691",
                "60084191526426145694823184325138172049",
                "157057593243643149005984172489367373276",
                "270408842380583503830298287509521390260"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-61550-8d7cfc24",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/icinga/icinga2/commit/a6f7cc7a4ef8beed023b24416106822d6940c4c0",
        "target":  {
            "file":  "lib/remote/jsonrpcconnection-pki.cpp"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "201925701246339456878585280727725614320",
            "length":  2449
        },
        "id":  "CVE-2026-61550-ac411240",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/icinga/icinga2/commit/4b7fb3405f4616a24b2b55e20f603a56b7dd6ad0",
        "target":  {
            "file":  "lib/remote/jsonrpcconnection-pki.cpp",
            "function":  "UpdateCertificateHandler"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "201925701246339456878585280727725614320",
            "length":  2449
        },
        "id":  "CVE-2026-61550-d275aaf1",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/icinga/icinga2/commit/6c2e0db3819f859910a4ae265461cb51b1d2039c",
        "target":  {
            "file":  "lib/remote/jsonrpcconnection-pki.cpp",
            "function":  "UpdateCertificateHandler"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "201925701246339456878585280727725614320",
            "length":  2449
        },
        "id":  "CVE-2026-61550-d89055ef",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/icinga/icinga2/commit/d37b0cfd7d9595ae2f02fadb3d724c98d8620f81",
        "target":  {
            "file":  "lib/remote/jsonrpcconnection-pki.cpp",
            "function":  "UpdateCertificateHandler"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "201925701246339456878585280727725614320",
            "length":  2449
        },
        "id":  "CVE-2026-61550-def9bbe5",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/icinga/icinga2/commit/a6f7cc7a4ef8beed023b24416106822d6940c4c0",
        "target":  {
            "file":  "lib/remote/jsonrpcconnection-pki.cpp",
            "function":  "UpdateCertificateHandler"
        }
    }
]
vanir_signatures_modified
"2026-10-28T11:18:18Z"