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    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-96260",
        "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
        "state": "PUBLISHED",
        "assignerShortName": "Mattermost",
        "dateReserved": "2026-09-22T20:00:26.276Z",
        "datePublished": "2026-09-22T20:34:49.141Z",
        "dateUpdated": "2026-09-23T15:06:07.254Z"
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                    "product": "Mattermost",
                    "vendor": "Mattermost",
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                            "lessThanOrEqual": "11.9.1",
                            "status": "affected",
                            "version": "11.9.0",
                            "versionType": "semver"
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                            "status": "affected",
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                            "version": "11.10.0",
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                            "version": "11.11.0",
                            "status": "unaffected"
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                            "version": "11.9.2",
                            "status": "unaffected"
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                            "status": "unaffected"
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                    "type": "finder",
                    "value": "alimursaliyev"
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            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to enforce a request body size limit during CSRF validation of plugin requests which allows an authenticated user to exhaust server memory and cause a denial of service via a large request body sent to a plugin endpoint.. Mattermost Advisory ID: MMSA-2026-00775"
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "HIGH",
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 6.5
                    },
                    "format": "CVSS",
                    "scenarios": [
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                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
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            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "type": "CWE",
                            "description": "CWE-789: Memory Allocation with Excessive Size Value",
                            "cweId": "CWE-789"
                        }
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                }
            ],
            "references": [
                {
                    "url": "https://mattermost.com/security-updates",
                    "name": "MMSA-2026-00775",
                    "tags": [
                        "vendor-advisory"
                    ]
                }
            ],
            "solutions": [
                {
                    "value": "Update Mattermost to versions 11.11.0, 11.9.2, 11.8.6, 11.7.11, 11.10.2 or higher.",
                    "lang": "en"
                }
            ],
            "source": {
                "advisory": "MMSA-2026-00775",
                "defect": [
                    "https://mattermost.atlassian.net/browse/MM-70503"
                ],
                "discovery": "EXTERNAL"
            },
            "title": "Mattermost server missing request body size limit on plugin routes allows denial of service by an authenticated user",
            "providerMetadata": {
                "orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
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                "dateUpdated": "2026-09-22T20:34:49.141Z"
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            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-23T15:05:56.037132Z",
                                "id": "CVE-2026-96260",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
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                                        "Automatable": "no"
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                                        "Technical Impact": "partial"
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                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                "title": "CISA ADP Vulnrichment",
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