RustFS: Reflective CORS with credentials on S3 listener; unauthenticated license metadata endpoint on console_CVE-2026-46685

{
    "lastseen": "",
    "description": "RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, when RUSTFS_CORS_ALLOWED_ORIGINS is unset, the RustFS S3 listener's ConditionalCorsLayer reflects any request Origin value back as Access-Control-Allow-Origin and also sets Access-Control-Allow-Credentials: true and Access-Control-Allow-Headers: * on responses, including preflight responses and error responses. This creates a permissive cross-domain policy with untrusted origins. A browser visiting an attacker-controlled page can issue credentialed cross-origin requests to a reachable RustFS deployment and read the response when the victim browser has ambient credentials for the RustFS origin, such as saved HTTP Basic Auth credentials, reverse-proxy SSO cookies, or TLS client certificates. This vulnerability is fixed in 1.0.0-beta.2.",
    "published": "2026-05-28T18:41:35.789Z",
    "modified": "2026-05-28T18:41:35.789Z",
    "type": "cve",
    "title": "RustFS: Reflective CORS with credentials on S3 listener; unauthenticated license metadata endpoint on console",
    "source": "GitHub_M",
    "references": "https://github.com/rustfs/rustfs/security/advisories/GHSA-x5xv-223c-8vm7",
    "id": "CVE-2026-46685",
    "bulletinFamily": "",
    "cwe": [
        "CWE-306",
        "CWE-346",
        "CWE-942"
    ],
    "cvelist": null,
    "sourceData": "rustfs rustfs < 1.0.0-beta.2",
    "sourceHref": "",
    "cvss": {
        "score": 6,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "rustfs",
    "version": "< 1.0.0-beta.2",
    "vendor": "rustfs",
    "ai_description": "",
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    "ai_score": 0
}