High severity · published Mar 10, 2026
CVE-2026-30947
Parse Server ha a bypass of class-level permissions in LiveQuery
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.2-alpha.3 and 8.6.16, 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. This vulnerability is fixed in 9.5.2-alpha.3 and 8.6.16.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PA
parse-server · parse-community
>= 9.0.0 < 9.5.2-alpha.3; < 8.6.16 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-30947
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-30947
Product
https://github.com/parse-community/parse-server/releases/tag/8.6.16
Product
https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.3
Mitigation
https://github.com/parse-community/parse-server/security/advisories/GHSA-7ch5-98q2-7289
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