Vulnerability · Published Apr 6, 2026 · Assigned by GitHub_M
CVE-2026-35200Parse Server has a file upload Content-Type override via extension mismatch
Low 2.1
In plain English
A low-severity security flaw in parse-server from parse-community. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | parse-server | 9.7.1-alpha.4 | GHSA-vr5f-2r24-w5hc |
| npm | parse-server | 8.6.73 | GHSA-vr5f-2r24-w5hc |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| parse-community | parse-server | >= 9.0.0, < 9.7.1-alpha.4< 8.6.73 |
Weakness: CWE-436 · 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
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-vr5f-2r24-w5hc x_refsource_CONFIRM
- https://github.com/parse-community/parse-server/pull/10383 x_refsource_MISC
- https://github.com/parse-community/parse-server/pull/10384 x_refsource_MISC