Auth bypass in Parse-Community Parse-Server
CVE-2026-30854
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. From version 9.3.1-alpha.3 to before version 9.5.0-alpha.10, when graphQLPublicIntrospection is disabled, __type queries nested inside inline fragments (e.g. ... on Query { __type(name:"User") { name } }) bypass the introspection control, allowing unauthenticated users to perform type reconnaissance. __schema introspection is not affected. This issue has been patched in version 9.5.0-alpha.10.
Vulnerability class: Broken Access Control
EPSS: 0.003 (20.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Parse-community Parse-server — versions >= 9.3.1-alpha.3, < 9.5.0-alpha.10
- Parseplatform Parse-server — versions 9.3.1, 9.5.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-30854?
- CVE-2026-30854 is a medium-severity vulnerability in Parse-Community Parse-Server, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2026-03-07.
- How severe is CVE-2026-30854?
- Medium severity. CVSS v3 base score is 5.3 out of 10.