CVE-2026-30228
EPSS 0.01%parse-server's file creation and deletion bypasses `readOnlyMasterKey` write restriction
Description
### 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 (2)
- Bitnami/parsefrom 0, < 9.5.0
- npm/parse-server>= 9.0.0, < 9.5.0-alpha.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-30228
- PATCHhttps://github.com/parse-community/parse-server
- WEBhttps://github.com/parse-community/parse-server/releases/tag/8.6.5
- WEBhttps://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.3
- WEBhttps://github.com/parse-community/parse-server/security/advisories/GHSA-xfh7-phr7-gr2x