CVE-2026-35200
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.
How to fix
- parseplatform parse-server8.6.73, 9.7.1 or later
- parse-server9.7.1-alpha.4, 8.6.73 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| parseplatform parse-server | v < 8.6.73, 9.0.0 ≤ v < 9.7.1, 9.7.1 | 8.6.73, 9.7.1 |
| parse-servernpm | 9.0.0 ≤ v < 9.7.1-alpha.4, v < 8.6.73 | 9.7.1-alpha.4, 8.6.73 |
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