Parse Server has a file upload Content-Type override via extension mismatch_CVE-2026-35200

{
    "lastseen": "",
    "description": "Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 8.6.73 and 9.7.1-alpha.4, a file can be uploaded with a filename extension that passes the file extension allowlist (e.g., .txt) but with a Content-Type header that differs from the extension (e.g., text/html). The Content-Type is passed to the storage adapter without consistency validation. Storage adapters that store and serve the provided Content-Type (such as S3 or GCS) serve the file with the mismatched Content-Type. The default GridFS adapter is not affected because it derives Content-Type from the filename at serving time. This vulnerability is fixed in 8.6.73 and 9.7.1-alpha.4.",
    "published": "2026-04-06T19:47:27.709Z",
    "modified": "2026-04-07T14:02:50.601Z",
    "type": "cve",
    "title": "Parse Server has a file upload Content-Type override via extension mismatch",
    "source": "GitHub_M",
    "references": "https://github.com/parse-community/parse-server/security/advisories/GHSA-vr5f-2r24-w5hc\nhttps://github.com/parse-community/parse-server/pull/10383\nhttps://github.com/parse-community/parse-server/pull/10384",
    "id": "CVE-2026-35200",
    "bulletinFamily": "",
    "cwe": [
        "CWE-436"
    ],
    "cvelist": null,
    "sourceData": "parse-community parse-server >= 9.0.0, < 9.7.1-alpha.4\nparse-community parse-server < 8.6.73",
    "sourceHref": "",
    "cvss": {
        "score": 2.1,
        "severity": "LOW",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "parse-server",
    "version": ">= 9.0.0, < 9.7.1-alpha.4",
    "vendor": "parse-community",
    "ai_description": "",
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    "ai_score": 0
}