CVE-2026-29182
HIGH
GHSA-vc89-5g3r-cmhh
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3Tags
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.
Analysis
Parse Server's readOnlyMasterKey incorrectly permits write operations on Cloud Hooks and Cloud Jobs despite being documented to deny mutations, allowing authenticated attackers with knowledge of the key to create, modify, and delete hooks or trigger jobs for potential data exfiltration. This vulnerability affects all Parse Server deployments using the readOnlyMasterKey option and has been patched in versions 8.6.4 and 9.4.1-alpha.3.
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Remediation
Within 24 hours: Identify all Parse Server instances using readOnlyMasterKey and assess exposure scope. Within 7 days: Apply vendor patches (versions 8.6.4 or 9.4.1-alpha.3 or later) to all affected systems, beginning with production environments. …
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