GHSA-79wj-8rqv-jvp5
parse-server's endpoint `/loginAs` allows `readOnlyMasterKey` to gain full read and write access as any user
At a glance
- Published
- Updated
- CVE
- CVE-2026-30229
- Aliases
- BIT-parse-2026-30229
- CVSS_V4
- CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Description
### Impact The `readOnlyMasterKey` can call `POST /loginAs` to obtain a valid session token for any user. This allows a read-only credential to impersonate arbitrary users with full read and write access to their data. Any Parse Server deployment that uses `readOnlyMasterKey` is affected. ### Patches The fix adds a check to the `/logInAs` handler. ### Workarounds There is no workaround other than not using `readOnlyMasterKey`. ### References - GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5 - Fix for Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.4 - Fix for Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.6
Affected packages
| Package | Versions |
|---|---|
| npm · parse-server | introduced 0, fixed 8.6.6 |
| npm · parse-server | introduced 9.0.0, fixed 9.5.0-alpha.4 |
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5 WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-30229 ADVISORY
- https://github.com/parse-community/parse-server PACKAGE
- https://github.com/parse-community/parse-server/releases/tag/8.6.6 WEB
- https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.4 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |