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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (37.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
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
- github.com/parse-community/parse-server/security/advisories/GHSA-7ch5-98q2-7289 (Patch, Mitigation, Vendor Advisory)
- github.com/parse-community/parse-server/releases/tag/8.6.16 (Product, Release Notes)
- github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.3 (Product, 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.