CVE-2026-33538
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.
How to fix
- parseplatform parse-server8.6.58, 9.6.0 or later
- parse-server9.6.0-alpha.52, 8.6.58 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| parseplatform parse-server | v < 8.6.58, 9.0.0 ≤ v < 9.6.0, 9.6.0 | 8.6.58, 9.6.0 |
| parse-servernpm | 9.0.0 ≤ v < 9.6.0-alpha.52, v < 8.6.58 | 9.6.0-alpha.52, 8.6.58 |
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Attack Surface Management
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