CVE-2026-34373
Published:March 31, 2026
Updated:April 23, 2026
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.66 and 9.7.0-alpha.10, the GraphQL API endpoint does not respect the allowOrigin server option and unconditionally allows cross-origin requests from any website. This bypasses origin restrictions that operators configure to control which websites can interact with the Parse Server API. The REST API correctly enforces the configured allowOrigin restriction. This issue has been patched in versions 8.6.66 and 9.7.0-alpha.10.
Affected Packages
https://github.com/parse-community/parse-server.git (GITHUB):
Affected version(s) >=2.0.0 <8.6.66Fix Suggestion:
Update to version 8.6.66https://github.com/parse-community/parse-server.git (GITHUB):
Affected version(s) >=9.0.0 <9.7.0-alpha.10Fix Suggestion:
Update to version 9.7.0-alpha.10parse-server (NPM):
Affected version(s) >=9.0.0 <9.7.0-alpha.10Fix Suggestion:
Update to version 9.7.0-alpha.10parse-server (NPM):
Affected version(s) >=3.5.0 <8.6.66Fix Suggestion:
Update to version 8.6.66Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.7
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Origin Validation Error
EPSS
Base Score:
0.02
