CVE-2026-33421
published 2026-03-24CVE-2026-33421: 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…
PriorityP341medium6.5CVSS 3.1
AVNACLPRLUINSUCHINAN
EPSS
0.40%
31.5th percentile
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.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| parse-community | parse-server | < 8.6.53 | 8.6.53 |
| parse-community | parse-server | — | — |
| parse-community | parse-server | >= 0 < 8.6.53 | 8.6.53 |
| parse-community | parse-server | >= 9.0.0 < 9.6.0-alpha.42 | 9.6.0-alpha.42 |
| parseplatform | parse-server | < 8.6.53 | 8.6.53 |
| parseplatform | parse-server | — | — |
| parseplatform | parse-server | >= 9.0.0 < 9.6.0 | 9.6.0 |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
nvdv4.07.1HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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GHSA
Parse Server's LiveQuery bypasses CLP pointer permission enforcement
ghsa·2026-03-20
CVE-2026-33421 [HIGH] CWE-863 Parse Server's LiveQuery bypasses CLP pointer permission enforcement
Parse Server's LiveQuery bypasses CLP pointer permission enforcement
### Impact
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.
### Patches
The LiveQuery server now enforces pointer permissions on each event. After the existing check passes (which defers pointer permissions by design), the fix checks
OSV
Parse Server's LiveQuery bypasses CLP pointer permission enforcement
osv·2026-03-20
CVE-2026-33421 [HIGH] Parse Server's LiveQuery bypasses CLP pointer permission enforcement
Parse Server's LiveQuery bypasses CLP pointer permission enforcement
### Impact
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.
### Patches
The LiveQuery server now enforces pointer permissions on each event. After the existing check passes (which defers pointer permissions by design), the fix checks
No detection rules found.
No public exploits indexed.
https://github.com/parse-community/parse-server/commit/6c3317aca6eb618ac48f999021ae3ef7766ad1eahttps://github.com/parse-community/parse-server/commit/976dad109f3fe3fbd0a3a35ef62e7a5d35eb0beehttps://github.com/parse-community/parse-server/pull/10250https://github.com/parse-community/parse-server/pull/10252https://github.com/parse-community/parse-server/security/advisories/GHSA-fph2-r4qg-9576
2026-03-24
Published