Parse Server has a bypass of class-level permissions in LiveQuery

CVE-2026-30947 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Impact

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.

Patches

The fix enforces CLP before creating the subscription and during event delivery.

Workarounds

Disable LiveQuery for classes that use CLP restrictions by removing them from the liveQuery.classNames server configuration.

References

  • GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-7ch5-98q2-7289
  • Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.3
  • Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.16

Basic information

Type
reviewed
Severity
high
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2026-03-11 00:17:16 UTC
Updated
2026-03-11 00:17:18 UTC
GitHub reviewed
2026-03-11 00:17:16 UTC
NVD published
2026-03-10

EPSS Score

Score Percentile
0.02% 4.62%

CVSS Scores

Base score Version Severity Vector
8.7 4.0 —
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:N)
No privileges are required.
User interaction (UI:N)
No user interaction is required.
Vulnerable system confidentiality impact (VC:H)
High confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:N)
No integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:N)
No availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:N)
No confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:N)
No integrity impact on subsequent systems.
Subsequent system availability impact (SA:N)
No availability impact on subsequent systems.

Identifiers

Type Value
GHSA GHSA-7ch5-98q2-7289 ↗
CVE CVE-2026-30947 ↗

CWEs

CWE id Name
CWE-863 Incorrect Authorization

Credits

  • offset (reporter)
  • mtrezza (coordinator)

Affected packages (2)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
npm parse-server >= 9.0.0, < 9.5.2-alpha.3 9.5.2-alpha.3 —
npm parse-server < 8.6.16 8.6.16 —

References

cvelogic Threat Intelligence