Rack’s Stored XSS in Rack::Directory via javascript: filenames rendered into anchor href_CVE-2026-25500

{
    "lastseen": "",
    "description": "Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, `Rack::Directory` generates an HTML directory index where each file entry is rendered as a clickable link. If a file exists on disk whose basename starts with the `javascript:` scheme (e.g. `javascript:alert(1)`), the generated index contains an anchor whose `href` is exactly `javascript:alert(1)`. Clicking the entry executes JavaScript in the browser (demonstrated with `alert(1)`). Versions 2.2.22, 3.1.20, and 3.2.5 fix the issue.",
    "published": "2026-02-18T18:59:31.964Z",
    "modified": "2026-02-18T18:59:31.964Z",
    "type": "cve",
    "title": "Rack's Stored XSS in Rack::Directory via javascript: filenames rendered into anchor href",
    "source": "GitHub_M",
    "references": "https://github.com/rack/rack/security/advisories/GHSA-whrj-4476-wvmp\nhttps://github.com/rack/rack/commit/f2f225f297b99fbee3d9f51255d41f601fc40aff",
    "id": "CVE-2026-25500",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79"
    ],
    "cvelist": null,
    "sourceData": "rack rack < 2.2.22\nrack rack >= 3.0.0.beta1, < 3.1.20\nrack rack >= 3.2.0, < 3.2.5",
    "sourceHref": "",
    "cvss": {
        "score": 5.4,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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": "rack",
    "version": "< 2.2.22",
    "vendor": "rack",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}