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        "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
        "state": "PUBLISHED",
        "assignerShortName": "Mattermost",
        "dateReserved": "2026-03-23T11:42:45.791Z",
        "datePublished": "2026-05-18T08:43:34.588Z",
        "dateUpdated": "2026-05-18T14:36:01.271Z"
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                    "product": "Mattermost",
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                            "lessThanOrEqual": "6.0.1",
                            "status": "affected",
                            "version": "0",
                            "versionType": "semver"
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                            "lessThanOrEqual": "5.4.13",
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                            "version": "0",
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                    "lang": "en",
                    "type": "finder",
                    "value": "Devin Binnie"
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            "descriptions": [
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                    "lang": "en",
                    "value": "Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent server-rendered content from closing an underlying application view in the Mattermost Desktop App which allows a malicious server or plugin to crash the desktop client via invoking {{window.close()}} in the renderer context, leading to a denial of service condition at the client level. Mattermost Advisory ID: MMSA-2026-00633"
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                    "cvssV3_1": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "LOW",
                        "userInteraction": "REQUIRED",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
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                        "baseSeverity": "LOW",
                        "baseScore": 3.5
                    },
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                            "lang": "en",
                            "value": "GENERAL"
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            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "type": "CWE",
                            "description": "CWE-754: Improper Check for Unusual or Exceptional Conditions",
                            "cweId": "CWE-754"
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            "references": [
                {
                    "url": "https://mattermost.com/security-updates",
                    "name": "MMSA-2026-00633",
                    "tags": [
                        "vendor-advisory"
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            ],
            "solutions": [
                {
                    "value": "Update Mattermost Desktop App to versions 6.2.0, 6.1.1.0, 5.13.5.0 or higher.",
                    "lang": "en"
                }
            ],
            "source": {
                "advisory": "MMSA-2026-00633",
                "defect": [
                    "https://mattermost.atlassian.net/browse/MM-67910"
                ],
                "discovery": "{\"self\"=>\"https://mattermost.atlassian.net/rest/api/2/customFieldOption/10557\", \"value\"=>\"Internal\", \"id\"=>\"10557\"}"
            },
            "title": "Calling window.close() from server-side content causes crash in the Mattermost Desktop App",
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                                "timestamp": "2026-05-18T14:35:39.361607Z",
                                "id": "CVE-2026-4643",
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                                        "Exploitation": "none"
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