Arelle < 2.39.10 Unauthenticated RCE via /rest/configure_CVE-2026-42796

{
    "lastseen": "",
    "description": "Arelle before 2.39.10 contains an unauthenticated remote code execution vulnerability in the /rest/configure REST endpoint that accepts a plugins query parameter and forwards it to the plugin manager without authentication or authorization. Attackers can supply a URL to a malicious Python file through the plugins parameter, causing the Arelle webserver to download and execute the attacker-controlled code within the Arelle process with its privileges.",
    "published": "2026-05-04T17:19:43.020Z",
    "modified": "2026-05-04T17:19:43.020Z",
    "type": "cve",
    "title": "Arelle < 2.39.10 Unauthenticated RCE via /rest/configure",
    "source": "VulnCheck",
    "references": "https://github.com/Arelle/Arelle/releases/tag/2.39.10\nhttps://github.com/Arelle/Arelle/pull/2320\nhttps://www.vulncheck.com/advisories/arelle-unauthenticated-rce-via-rest-configure",
    "id": "CVE-2026-42796",
    "bulletinFamily": "",
    "cwe": [
        "CWE-306"
    ],
    "cvelist": null,
    "sourceData": "Arelle Arelle 0",
    "sourceHref": "",
    "cvss": {
        "score": 9.2,
        "severity": "CRITICAL",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "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": "Arelle",
    "version": "0",
    "vendor": "Arelle",
    "ai_description": "Unauthenticated remote code execution vulnerability in Arelle's /rest/configure REST endpoint",
    "ai_severity": "Critical",
    "ai_vendor": "Arelle",
    "ai_product": "Arelle",
    "ai_version": "< 2.39.10",
    "ai_score": 9.2
}