{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-24097",
        "assignerOrgId": "f7d6281c-4801-44ce-ace2-493291dedb0f",
        "state": "PUBLISHED",
        "assignerShortName": "Checkmk",
        "dateReserved": "2026-01-21T14:39:24.128Z",
        "datePublished": "2026-03-13T09:40:05.075Z",
        "dateUpdated": "2026-03-13T15:56:41.327Z"
    },
    "containers": {
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            "affected": [
                {
                    "defaultStatus": "unaffected",
                    "product": "Checkmk",
                    "vendor": "Checkmk GmbH",
                    "versions": [
                        {
                            "lessThan": "2.4.0p23",
                            "status": "affected",
                            "version": "2.4.0",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "lessThan": "2.3.0p43",
                            "version": "2.3.0",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "2.2.0",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Improper permission enforcement in Checkmk versions 2.4.0 before 2.4.0p23, 2.3.0 before 2.3.0p43, and 2.2.0 (EOL) allows authenticated users to enumerate existing hosts by observing different HTTP response codes in agent-receiver/register_existing endpoint, which could lead to information disclosure."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-180",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-180: Exploiting Incorrectly Configured Access Control Security Levels"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "baseScore": 5.3,
                        "baseSeverity": "MEDIUM",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-204",
                            "description": "CWE-204: Observable Response Discrepancy",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "f7d6281c-4801-44ce-ace2-493291dedb0f",
                "shortName": "Checkmk",
                "dateUpdated": "2026-03-13T09:40:05.075Z"
            },
            "references": [
                {
                    "url": "https://checkmk.com/werk/18993"
                }
            ],
            "title": "Authenticated Host Enumeration via Observable Response Discrepancy on Agent Register Existing Endpoint",
            "cpeApplicability": [
                {
                    "nodes": [
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                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.4.0",
                                    "versionEndExcluding": "2.4.0p23"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.3.0",
                                    "versionEndExcluding": "2.3.0p43"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*"
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                            ]
                        }
                    ]
                }
            ]
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-03-13T15:56:33.201099Z",
                                "id": "CVE-2026-24097",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
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                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
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