CVE-2026-29182
EPSS 0.02%Parse Server's Cloud Hooks and Cloud Jobs bypass `readOnlyMasterKey` write restriction
Description
### 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 (2)
- Bitnami/parsefrom 0, < 9.4.1
- npm/parse-server>= 9.0.0, < 9.4.1-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:H/VI:H/VA:H/SC:N/SI:N/SA:N |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-29182
- PATCHhttps://github.com/parse-community/parse-server
- WEBhttps://github.com/parse-community/parse-server/releases/tag/8.6.4
- WEBhttps://github.com/parse-community/parse-server/releases/tag/9.4.1-alpha.3
- WEBhttps://github.com/parse-community/parse-server/security/advisories/GHSA-vc89-5g3r-cmhh