CVE-2026-30228
parse-server's file creation and deletion bypasses `readOnlyMasterKey` write restriction
Impact
### Impact The `readOnlyMasterKey` can be used to create and delete files via the Files API (`POST /files/:filename`, `DELETE /files/:filename`). This bypasses the read-only restriction which violates the access scope of the `readOnlyMasterKey`. Any Parse Server deployment that uses `readOnlyMasterKey` and exposes the Files API is affected. An attacker with access to the `readOnlyMasterKey` can upload arbitrary files or delete existing files. ### Patches The fix adds permission checks to both the file upload and file delete handlers. ### Workarounds There is no workaround other than not using `readOnlyMasterKey`, or restricting network access to the Files API endpoints. ### References - GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-xfh7-phr7-gr2x - Fix for Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.3 - Fix for Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.5
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | parse-server | >= 9.0.0, < 9.5.0-alpha.3 | 9.5.0-alpha.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Parseplatform | Parse-Server | before 8.6.5 from 9.0.0 through 9.4.1 Version 9.5.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/parse-community/parse-server/releases/tag/8.6.5
- https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.3
- https://github.com/parse-community/parse-server/security/advisories/GHSA-xfh7-phr7-gr2x
- https://github.com/advisories/GHSA-xfh7-phr7-gr2x
- https://nvd.nist.gov/vuln/detail/CVE-2026-30228