CVE-2026-33538

HIGH

Parse Server: Denial of service via unindexed database query for unconfigured auth providers

Title source: cna
STIX 2.1

Description

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.

References (5)

Core 5

Scores

CVSS v3 7.5
EPSS 0.0041
EPSS Percentile 32.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-400
Status published
Products (4)
npm/parse-server 9.0.0 - 9.6.0-alpha.52npm
parse-community/parse-server < 8.6.58
parse-community/parse-server >= 9.0.0, < 9.6.0-alpha.52
parseplatform/parse-server 9.6.0 alpha1 (47 CPE variants)
Published Mar 24, 2026
Tracked Since Mar 25, 2026