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    "cveMetadata": {
        "cveId": "CVE-2026-5308",
        "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
        "state": "PUBLISHED",
        "assignerShortName": "Mattermost",
        "dateReserved": "2026-04-01T10:35:26.431Z",
        "datePublished": "2026-05-22T10:20:43.629Z",
        "dateUpdated": "2026-05-22T12:14:58.221Z"
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                    "vendor": "Mattermost",
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                            "lessThanOrEqual": "11.6.0",
                            "status": "affected",
                            "version": "11.6.0",
                            "versionType": "semver"
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                            "lessThanOrEqual": "11.5.3",
                            "status": "affected",
                            "version": "11.5.0",
                            "versionType": "semver"
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                            "lessThanOrEqual": "11.4.4",
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                            "version": "11.4.0",
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                            "lessThanOrEqual": "10.11.14",
                            "status": "affected",
                            "version": "10.11.0",
                            "versionType": "semver"
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                            "version": "11.7.0",
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                            "version": "11.6.1",
                            "status": "unaffected"
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                            "status": "unaffected"
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                            "status": "unaffected"
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                    "lang": "en",
                    "type": "finder",
                    "value": "thecybertantrik"
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            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to enforce request body size limits on plugin HTTP endpoints which allows an attacker to cause a denial of service via crafted oversized HTTP requests.. Mattermost Advisory ID: MMSA-2026-00646"
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "HIGH",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "HIGH",
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 4.9
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
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            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "type": "CWE",
                            "description": "CWE-400 Uncontrolled Resource Consumption",
                            "cweId": "CWE-400"
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                    ]
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            ],
            "references": [
                {
                    "url": "https://mattermost.com/security-updates",
                    "name": "MMSA-2026-00646",
                    "tags": [
                        "vendor-advisory"
                    ]
                }
            ],
            "solutions": [
                {
                    "value": "Update Mattermost to versions 11.7.0, 11.6.1, 11.5.4, 11.4.5, 10.11.15 or higher.",
                    "lang": "en"
                }
            ],
            "source": {
                "advisory": "MMSA-2026-00646",
                "defect": [
                    "https://mattermost.atlassian.net/browse/MM-68163"
                ],
                "discovery": "EXTERNAL"
            },
            "title": "Missing request body size limits on Zoom plugin HTTP endpoints",
            "providerMetadata": {
                "orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee",
                "shortName": "Mattermost",
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                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-05-22T12:14:52.101944Z",
                                "id": "CVE-2026-5308",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
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                                        "Automatable": "no"
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                                        "Technical Impact": "partial"
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                                "version": "2.0.3"
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                ],
                "title": "CISA ADP Vulnrichment",
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