Vulnerability-Lookup

GHSA-VR5F-2R24-W5HC

Vulnerability from github – Published: 2026-04-04 04:22 – Updated: 2026-04-06 23:43

Summary

Parse Server: File upload Content-Type override via extension mismatch

Details

Impact

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.

Patches

The file upload now derives the Content-Type from the filename extension, overriding any user-provided Content-Type when the file has an extension.

Workarounds

Configure the storage adapter or CDN to derive Content-Type from the filename extension instead of using the stored Content-Type.

Severity ?

2.1 (Low)


                  
                    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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "parse-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "9.0.0"
            },
            {
              "fixed": "9.7.1-alpha.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 8.6.72"
      },
      "package": {
        "ecosystem": "npm",
        "name": "parse-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.6.73"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-35200"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-436"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-04T04:22:11Z",
    "nvd_published_at": "2026-04-06T20:16:27Z",
    "severity": "LOW"
  },
  "details": "### Impact\n\nA 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.\n\n### Patches\n\nThe file upload now derives the Content-Type from the filename extension, overriding any user-provided Content-Type when the file has an extension.\n\n### Workarounds\n\nConfigure the storage adapter or CDN to derive Content-Type from the filename extension instead of using the stored Content-Type.",
  "id": "GHSA-vr5f-2r24-w5hc",
  "modified": "2026-04-06T23:43:26Z",
  "published": "2026-04-04T04:22:11Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-vr5f-2r24-w5hc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-35200"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/pull/10383"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/pull/10384"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/parse-community/parse-server"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Parse Server: File upload Content-Type override via extension mismatch"
}

CVE-2026-35200 (GCVE-0-2026-35200)

Vulnerability from cvelistv5 – Published: 2026-04-06 19:47 – Updated: 2026-04-07 14:02

Title

Parse Server has a file upload Content-Type override via extension mismatch

Summary

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.

Severity ?

2.1 (Low)


                        
                          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

CWE

CWE-436 - Interpretation Conflict

Assigner

GitHub_M

References

URL

Tags

	https://github.com/parse-community/parse-server/s…	x_refsource_CONFIRM
	https://github.com/parse-community/parse-server/p…	x_refsource_MISC
	https://github.com/parse-community/parse-server/p…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	parse-community	parse-server	Affected: >= 9.0.0, < 9.7.1-alpha.4 Affected: < 8.6.73

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