Caddy: Windows `file_server` path authorization bypass via encoded backslash_CVE-2026-52844

{
    "lastseen": "",
    "description": "Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, on Windows, Caddy path matchers treat /private\\secret.txt as outside /private/*, but file_server later resolves the same request path as private\\secret.txt on disk. An unauthenticated remote client can bypass Caddy path-scoped auth/deny routes protecting /private/*. This vulnerability is fixed in 2.11.4.",
    "published": "2026-06-23T17:50:42.386Z",
    "modified": "2026-06-23T17:50:42.386Z",
    "type": "cve",
    "title": "Caddy: Windows `file_server` path authorization bypass via encoded backslash",
    "source": "GitHub_M",
    "references": "https://github.com/caddyserver/caddy/security/advisories/GHSA-qrp7-cvwr-j2c6",
    "id": "CVE-2026-52844",
    "bulletinFamily": "",
    "cwe": [
        "CWE-22",
        "CWE-284"
    ],
    "cvelist": null,
    "sourceData": "caddyserver caddy < 2.11.4",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/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": "caddy",
    "version": "< 2.11.4",
    "vendor": "caddyserver",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}