Skip to content
OpenAdvisories
High · 8.7 CVE-2026-33538 BIT-parse-2026-33538EUVD-2026-14975GHSA-g4cf-xj29-wqqr

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

Published Mar 24, 2026 · Updated Mar 24, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
parse-community parse-server < 8.6.58, >= 9.0.0, < 9.6.0-alpha.52 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm parse-server >= 9.0.0, < 9.6.0-alpha.52 9.6.0-alpha.52 GHSA-g4cf-xj29-wqqr
npm parse-server < 8.6.58 8.6.58 GHSA-g4cf-xj29-wqqr

References