CVE-2026-33163

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.35 and 8.6.50, when a `Parse.Cloud.afterLiveQueryEvent` trigger is registered for a class, the LiveQuery server leaks protected fields and `authData` to all subscribers of that class. Fields configured as protected via Class-Level Permissions (`protectedFields`) are included in LiveQuery event payloads for all event types (create, update, delete, enter, leave). Any user with sufficient CLP permissions to subscribe to the affected class can receive protected field data of other users, including sensitive personal information and OAuth tokens from third-party authentication providers. The vulnerability was caused by a reference detachment bug. When an `afterEvent` trigger is registered, the LiveQuery server converts the event object to a `Parse.Object` for the trigger, then creates a new JSON copy via `toJSONwithObjects()`. The sensitive data filter was applied to the `Parse.Object` reference, but the unfiltered JSON copy was sent to clients. The fix in versions 9.6.0-alpha.35 and 8.6.50 ensures that the JSON copy is assigned back to the response object before filtering, so the filter operates on the actual data sent to clients. As a workaround, remove all `Parse.Cloud.afterLiveQueryEvent` trigger registrations. Without an `afterEvent` trigger, the reference detachment does not occur and protected fields are correctly filtered.

• CWE-200

• https://github.com/parse-community/parse-server/pull/10232Issue Tracking
• https://github.com/parse-community/parse-server/pull/10233Issue Tracking
• https://github.com/parse-community/parse-server/security/advisories/GHSA-5hmj-jcgp-6hffVendor Advisory

Published

Mar 18, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-33157Craft CMS is a content management system (CMS). From version…7.2
• CVE-2026-33158Craft CMS is a content management system (CMS). From version…6.5
• CVE-2026-33159Craft CMS is a content management system (CMS). From version…6.5
• CVE-2026-33160Craft CMS is a content management system (CMS). From version…5.3
• CVE-2026-33161Craft CMS is a content management system (CMS). From version…4.3
• CVE-2026-33162Craft CMS is a content management system (CMS). From version…6.5
• CVE-2026-33164libde265 is an open source implementation of the h.265 video…7.5
• CVE-2026-33165libde265 is an open source implementation of the h.265 video…5
• CVE-2026-33166Allure 2 is the version 2.x branch of Allure Report, a multi…7.5
• CVE-2026-33167Action Pack is a Rubygem for building web applications on th…6.1
• CVE-2026-33168Action View provides conventions and helpers for building we…2.3
• CVE-2026-33169Active Support is a toolkit of support libraries and Ruby co…5.3