Insufficient input validation in GitHub plugin API causes denial of service_CVE-2026-4646

{
    "lastseen": "",
    "description": "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 validate user-supplied input in API request handlers which allows an authenticated attacker to crash the plugin process via a crafted HTTP request to the PR details endpoint.. Mattermost Advisory ID: MMSA-2026-00638",
    "published": "2026-05-22T10:25:17.315Z",
    "modified": "2026-05-22T12:13:19.526Z",
    "type": "cve",
    "title": "Insufficient input validation in GitHub plugin API causes denial of service",
    "source": "Mattermost",
    "references": "https://mattermost.com/security-updates",
    "id": "CVE-2026-4646",
    "bulletinFamily": "",
    "cwe": [
        "CWE-1287"
    ],
    "cvelist": null,
    "sourceData": "Mattermost Mattermost 11.6.0\nMattermost Mattermost 11.5.0\nMattermost Mattermost 11.4.0\nMattermost Mattermost 10.11.0",
    "sourceHref": "",
    "cvss": {
        "score": 4.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
        "version": "3.1"
    },
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    "href": "",
    "category_name": "CVE",
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    "product": "Mattermost",
    "version": "11.6.0",
    "vendor": "Mattermost",
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