{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-26304",
        "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
        "state": "PUBLISHED",
        "assignerShortName": "Mattermost",
        "dateReserved": "2026-02-13T10:43:14.474Z",
        "datePublished": "2026-03-16T19:53:21.650Z",
        "dateUpdated": "2026-03-17T13:38:03.996Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "defaultStatus": "unaffected",
                    "product": "Mattermost",
                    "vendor": "Mattermost",
                    "versions": [
                        {
                            "lessThanOrEqual": "11.3.0",
                            "status": "affected",
                            "version": "11.3.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThanOrEqual": "11.2.2",
                            "status": "affected",
                            "version": "11.2.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "11.4.0",
                            "status": "unaffected"
                        },
                        {
                            "version": "11.3.1",
                            "status": "unaffected"
                        },
                        {
                            "version": "11.2.3",
                            "status": "unaffected"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "0x7oda7123"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2 fail to verify run_create permission for empty playbookId, which allows team members to create unauthorized runs via the playbook run API. Mattermost Advisory ID: MMSA-2025-00542"
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "LOW",
                        "availabilityImpact": "NONE",
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 4.3
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "type": "CWE",
                            "description": "CWE-863: Incorrect Authorization",
                            "cweId": "CWE-863"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://mattermost.com/security-updates",
                    "name": "MMSA-2025-00542",
                    "tags": [
                        "vendor-advisory"
                    ]
                }
            ],
            "solutions": [
                {
                    "value": "Update Mattermost to versions 11.4.0, 11.3.1, 11.2.3 or higher.",
                    "lang": "en"
                }
            ],
            "source": {
                "advisory": "MMSA-2025-00542",
                "defect": [
                    "https://mattermost.atlassian.net/browse/MM-66248"
                ],
                "discovery": "EXTERNAL"
            },
            "title": "Permission Bypass in Playbook Run Creation",
            "providerMetadata": {
                "orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
                "shortName": "Mattermost",
                "dateUpdated": "2026-03-16T19:53:21.650Z"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-03-17T13:37:56.844126Z",
                                "id": "CVE-2026-26304",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-03-17T13:38:03.996Z"
                }
            }
        ]
    }
}