Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Parseplatform | Parse-Server | < 8.6.58 |
Related Weaknesses (CWE)
References
- https://github.com/parse-community/parse-server/commit/40eb442e02672986730007d0aPatch
- https://github.com/parse-community/parse-server/commit/fbac847499e57f243315c5fc7Patch
- https://github.com/parse-community/parse-server/pull/10270Issue Tracking
- https://github.com/parse-community/parse-server/pull/10271Issue Tracking
- https://github.com/parse-community/parse-server/security/advisories/GHSA-g4cf-xjVendor Advisory
FAQ
What is CVE-2026-33538?
CVE-2026-33538 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ser...
How severe is CVE-2026-33538?
CVE-2026-33538 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33538?
Check the references section above for vendor advisories and patch information. Affected products include: Parseplatform Parse-Server.