{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-3472",
        "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
        "state": "PUBLISHED",
        "assignerShortName": "Mattermost",
        "dateReserved": "2026-03-03T11:25:53.785Z",
        "datePublished": "2026-06-26T14:42:24.154Z",
        "dateUpdated": "2026-06-26T15:41:09.780Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "defaultStatus": "unaffected",
                    "product": "Mattermost",
                    "vendor": "Mattermost",
                    "versions": [
                        {
                            "lessThanOrEqual": "10.11.18",
                            "status": "affected",
                            "version": "10.11.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThanOrEqual": "11.6.3",
                            "status": "affected",
                            "version": "11.6.0",
                            "versionType": "semver"
                        },
                        {
                            "lessThanOrEqual": "11.5.6",
                            "status": "affected",
                            "version": "11.5.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "11.7.0",
                            "status": "unaffected"
                        },
                        {
                            "version": "10.11.19",
                            "status": "unaffected"
                        },
                        {
                            "version": "11.6.4",
                            "status": "unaffected"
                        },
                        {
                            "version": "11.5.7",
                            "status": "unaffected"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Juho Forsén"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Mattermost versions 10.11.x <= 10.11.18, 11.6.x <= 11.6.3, 11.5.x <= 11.5.6 fail to properly apply markdown image rendering restrictions to AI bot tool result posts, which allows an authenticated attacker to exfiltrate data to an attacker-controlled server via injecting markdown image syntax into tool result content rendered by a victim's client.. Mattermost Advisory ID: MMSA-2026-00619"
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "LOW",
                        "userInteraction": "REQUIRED",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "NONE",
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N",
                        "baseSeverity": "LOW",
                        "baseScore": 3.5
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "type": "CWE",
                            "description": "CWE-693: Protection Mechanism Failure",
                            "cweId": "CWE-693"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://mattermost.com/security-updates",
                    "name": "MMSA-2026-00619",
                    "tags": [
                        "vendor-advisory"
                    ]
                }
            ],
            "solutions": [
                {
                    "value": "Update Mattermost to versions 11.7.0, 10.11.19, 11.6.4, 11.5.7 or higher.",
                    "lang": "en"
                }
            ],
            "source": {
                "advisory": "MMSA-2026-00619",
                "defect": [
                    "https://mattermost.atlassian.net/browse/MM-67751"
                ],
                "discovery": "{\"self\"=>\"https://mattermost.atlassian.net/rest/api/2/customFieldOption/10557\", \"value\"=>\"Internal\", \"id\"=>\"10557\"}"
            },
            "title": "Markdown image rendering bypass in AI bot tool result posts in Mattermost",
            "providerMetadata": {
                "orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
                "shortName": "Mattermost",
                "dateUpdated": "2026-06-26T14:42:24.154Z"
            },
            "x_generator": {
                "engine": "cvelib 1.8.0"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-06-26T15:41:02.864491Z",
                                "id": "CVE-2026-3472",
                                "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": "2026-06-26T15:41:09.780Z"
                }
            }
        ]
    }
}