Auth bypass in Parse-Community Parse-Server
CVE-2026-30947
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.
Vulnerability class: Broken Access Control
EPSS: 0.004 (34.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Parse-community Parse-server — versions >= 9.0.0 < 9.5.2-alpha.3, < 8.6.16
- Parseplatform Parse-server — versions 9.5.2
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Mitigation, Vendor Advisory)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-30947?
- CVE-2026-30947 is a high-severity vulnerability in Parse-Community Parse-Server, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2026-03-10.
- How severe is CVE-2026-30947?
- High severity. CVSS v3 base score is 7.5 out of 10.