view_component: System Test Entry Point Path Check Allows Sibling Directory Escape_CVE-2026-44837

{
    "lastseen": "",
    "description": "view_component is a framework for building reusable, testable, and encapsulated view components in Ruby on Rails. From 3.0.0 to 4.9.0, the system test entrypoint canonicalizes a user-controlled file path with File.realpath, then checks whether the resolved path starts with the temp directory path. This is not a safe containment check because sibling directories can share the same string prefix. This vulnerability is fixed in 4.9.0.",
    "published": "2026-05-26T19:40:47.661Z",
    "modified": "2026-05-26T19:40:47.661Z",
    "type": "cve",
    "title": "view_component: System Test Entry Point Path Check Allows Sibling Directory Escape",
    "source": "GitHub_M",
    "references": "https://github.com/ViewComponent/view_component/security/advisories/GHSA-hg3h-g7xc-f7vp",
    "id": "CVE-2026-44837",
    "bulletinFamily": "",
    "cwe": [
        "CWE-187"
    ],
    "cvelist": null,
    "sourceData": "ViewComponent view_component >= 3.0.0, < 4.9.0",
    "sourceHref": "",
    "cvss": {
        "score": 5.9,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
        "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": "view_component",
    "version": ">= 3.0.0, < 4.9.0",
    "vendor": "ViewComponent",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}