CVE-2026-35200

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.

The following products are affected by CVE-2026-35200 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-35200.

URL	Resource
https://github.com/parse-community/parse-server/pull/10383
https://github.com/parse-community/parse-server/pull/10384
https://github.com/parse-community/parse-server/security/advisories/GHSA-vr5f-2r24-w5hc