CVE-2026-33421
CVE-2026-33421 · Parse Server: LiveQuery bypasses CLP pointer permission enforcement
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.53 and 9.6.0-alpha.42, Parse Server's LiveQuery WebSocket interface does not enforce Class-Level Permission (CLP) pointer permissions (readUserFields and pointerFields). Any authenticated user can subscribe to LiveQuery events and receive real-time updates for all objects in classes protected by pointer permissions, regardless of whether the pointer fields on those objects point to the subscribing user. This bypasses the intended read access control, allowing unauthorized access to potentially sensitive data that is correctly restricted via the REST API. This issue has been patched in versions 8.6.53 and 9.6.0-alpha.42.
CVSS 7.1 · High · EPSS 0.5% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
parse-server
- Versions
- < 8.6.53: Affected
- >= 9.0.0, < 9.6.0-alpha.42: Affected
No fix published
parse-server npm
- Affected ranges
- SEMVER: ≥ 9.0.0, < 9.6.0-alpha.42
Update to 9.6.0-alpha.42
parse-server npm
- Affected ranges
- SEMVER: < 8.6.53
Update to 8.6.53
Original sources
- https://github.com/parse-community/parse-server/security/advisories/GHSA-fph2-r4qg-9576
- https://github.com/parse-community/parse-server/pull/10250
- https://github.com/parse-community/parse-server/pull/10252
- https://github.com/parse-community/parse-server/commit/6c3317aca6eb618ac48f999021ae3ef7766ad1ea
- https://github.com/parse-community/parse-server/commit/976dad109f3fe3fbd0a3a35ef62e7a5d35eb0bee
- https://nvd.nist.gov/vuln/detail/CVE-2026-33421