CVE-2026-30947
March 10, 2026
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.2-alpha.3 and 8.6.16, class-level permissions (CLP) are not enforced for LiveQuery subscriptions. An unauthenticated or unauthorized client can subscribe to any LiveQuery-enabled class and receive real-time events for all objects, regardless of CLP restrictions. All Parse Server deployments that use LiveQuery with class-level permissions are affected. Data intended to be restricted by CLP is leaked to unauthorized subscribers in real time. This vulnerability is fixed in 9.5.2-alpha.3 and 8.6.16.
Affected Packages
https://github.com/parse-community/parse-server.git (GITHUB):
Affected version(s) >=2.0.0 <8.6.16Fix Suggestion:
Update to version 8.6.16https://github.com/parse-community/parse-server.git (GITHUB):
Affected version(s) >=9.0.0 <9.5.2-alpha.3Fix Suggestion:
Update to version 9.5.2-alpha.3parse-server (NPM):
Affected version(s) >=1.0.0 <8.6.16Fix Suggestion:
Update to version 8.6.16parse-server (NPM):
Affected version(s) >=9.0.0 <9.5.2-alpha.3Fix Suggestion:
Update to version 9.5.2-alpha.3Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Incorrect Authorization
EPSS
Base Score:
0.02
