Resource exhaustion in Parse-Community Parse-Server
CVE-2026-33538
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.58 and 9.6.0-alpha.52, an unauthenticated attacker can cause denial of service by sending authentication requests with arbitrary, unconfigured provider names. The server executes a database query for each unconfigured provider before rejecting the request, and since no database index exists for unconfigured providers, each request triggers a full collection scan on the user database. This can be parallelized to saturate database resources. This issue has been patched in versions 8.6.58 and 9.6.0-alpha.52.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.004 (33.3th 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:N/I:N/A:H.
Affected products
- Parse-community Parse-server — versions < 8.6.58, >= 9.0.0, < 9.6.0-alpha.52
- Parseplatform Parse-server — versions 9.6.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-33538?
- CVE-2026-33538 is a high-severity vulnerability in Parse-Community Parse-Server, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-03-24.
- How severe is CVE-2026-33538?
- High severity. CVSS v3 base score is 7.5 out of 10.