MajorDoMo Command Injection in rc/index.php via Race Condition_CVE-2026-27175

{
    "lastseen": "",
    "description": "MajorDoMo (aka Major Domestic Module) is vulnerable to unauthenticated OS command injection via rc/index.php. The $param variable from user input is interpolated into a command string within double quotes without sanitization via escapeshellarg(). The command is inserted into a database queue by safe_exec(), which performs no sanitization. The cycle_execs.php script, which is web-accessible without authentication, retrieves queued commands and passes them directly to exec(). An attacker can exploit a race condition by first triggering cycle_execs.php (which purges the queue and enters a polling loop), then injecting a malicious command via the rc endpoint while the worker is polling. The injected shell metacharacters expand inside double quotes, achieving remote code execution within one second.",
    "published": "2026-02-18T21:10:36.987Z",
    "modified": "2026-02-18T21:10:36.987Z",
    "type": "cve",
    "title": "MajorDoMo Command Injection in rc/index.php via Race Condition",
    "source": "VulnCheck",
    "references": "https://chocapikk.com/posts/2026/majordomo-revisited/\nhttps://github.com/sergejey/majordomo/pull/1177\nhttps://www.vulncheck.com/advisories/majordomo-command-injection-in-rcindexphp-via-race-condition",
    "id": "CVE-2026-27175",
    "bulletinFamily": "",
    "cwe": [
        "CWE-78"
    ],
    "cvelist": null,
    "sourceData": "sergejey MajorDoMo 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": "MajorDoMo",
    "version": "0",
    "vendor": "sergejey",
    "ai_description": "Unauthenticated OS command injection vulnerability in MajorDoMo via rc/index.php",
    "ai_severity": "Critical",
    "ai_vendor": "sergejey",
    "ai_product": "MajorDoMo",
    "ai_version": "0",
    "ai_score": 9.2
}