Grav: Administrative Account Disruption and Privilege De-escalation via User Overwrite Logic_CVE-2026-42609

{
    "lastseen": "",
    "description": "Grav is a file-based Web platform. Prior to 2.0.0-beta.2, a business logic vulnerability in the Grav Admin Panel allows a low-privileged user (with only user creation permissions) to overwrite existing accounts, including the primary administrator. By creating a new user with a username that already exists, the system updates the existing account's metadata and permissions instead of rejecting the request. This leads to a Denial of Service (DoS) on administrative functions and Privilege De-escalation of the root account. This vulnerability is fixed in 2.0.0-beta.2.",
    "published": "2026-05-11T15:03:38.296Z",
    "modified": "2026-05-11T15:03:38.296Z",
    "type": "cve",
    "title": "Grav: Administrative Account Disruption and Privilege De-escalation via User Overwrite Logic",
    "source": "GitHub_M",
    "references": "https://github.com/getgrav/grav/security/advisories/GHSA-rr73-568v-28f8\nhttps://github.com/getgrav/grav/commit/5a12f9be8314682c8713e569e330f11805d0a663\nhttps://github.com/getgrav/grav/commit/c66dfeb5ff679a1667678c6335eb9ff3255dfc47\nhttps://github.com/getgrav/grav/commit/d904efc33e03ebb597afde8d3368b28cf0423632",
    "id": "CVE-2026-42609",
    "bulletinFamily": "",
    "cwe": [
        "CWE-269",
        "CWE-285",
        "CWE-639",
        "CWE-837"
    ],
    "cvelist": null,
    "sourceData": "getgrav grav < 2.0.0-beta.2",
    "sourceHref": "",
    "cvss": {
        "score": 8.1,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "grav",
    "version": "< 2.0.0-beta.2",
    "vendor": "getgrav",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}