CVE-2026-29182
Parse Server's Cloud Hooks and Cloud Jobs bypass `readOnlyMasterKey` write restriction
Impact
### Impact Parse Server's `readOnlyMasterKey` option allows access with master-level read privileges but is documented to deny all write operations. However, some endpoints incorrectly accept the `readOnlyMasterKey` for mutating operations. This allows a caller who only holds the `readOnlyMasterKey` to create, modify, and delete Cloud Hooks and to start Cloud Jobs, which can be used for data exfiltration. Any Parse Server deployment that uses the `readOnlyMasterKey` option is affected. Note than an attacker needs to know the `readOnlyMasterKey` to exploit this vulnerability. ### Patches The fix adds authorization checks, rejecting mutating requests made with the `readOnlyMasterKey`. ### Workarounds There is no known workaround other than upgrading. If upgrading is not immediately possible, ensure the `readOnlyMasterKey` value is not shared with untrusted parties. ### Resources - GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-vc89-5g3r-cmhh - Fixed in Parse Server 9.4.1-alpha.3: https://github.com/parse-community/parse-server/releases/tag/9.4.1-alpha.3 - Fixed in Parse Server 8.6.4: https://github.com/parse-community/parse-server/releases/tag/8.6.4
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | parse-server | >= 9.0.0, <= 9.4.1-alpha.2 | 9.4.1-alpha.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Parseplatform | Parse-Server | before 8.6.4 from 9.0.0 through 9.4.0 Version 9.4.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/parse-community/parse-server/releases/tag/8.6.4
- https://github.com/parse-community/parse-server/releases/tag/9.4.1-alpha.3
- https://github.com/parse-community/parse-server/security/advisories/GHSA-vc89-5g3r-cmhh
- https://github.com/advisories/GHSA-vc89-5g3r-cmhh
- https://nvd.nist.gov/vuln/detail/CVE-2026-29182