Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.4 and 9.4.1-alpha.3, 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. This issue has been patched in versions 8.6.4 and 9.4.1-alpha.3.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-vc89-5g3r-cmhh Parse Server's Cloud Hooks and Cloud Jobs bypass `readOnlyMasterKey` write restriction
Fixes

Solution

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Workaround

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History

Fri, 06 Mar 2026 20:45:00 +0000

Type Values Removed Values Added
Description Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.4 and 9.4.1-alpha.3, 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. This issue has been patched in versions 8.6.4 and 9.4.1-alpha.3.
Title Parse Server: Cloud Hooks and Cloud Jobs bypass `readOnlyMasterKey` write restriction
Weaknesses CWE-863
References
Metrics cvssV4_0

{'score': 8.6, 'vector': '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-06T20:24:10.802Z

Reserved: 2026-03-04T14:44:00.713Z

Link: CVE-2026-29182

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-03-06T21:16:15.137

Modified: 2026-03-06T21:16:15.137

Link: CVE-2026-29182

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses