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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.

PUBLISHED Reserved 2026-03-20 | Published 2026-03-24 | Updated 2026-03-24 | Assigner GitHub_M




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-400: Uncontrolled Resource Consumption

Product status

< 8.6.58
affected

>= 9.0.0, < 9.6.0-alpha.52
affected

References

github.com/...server/security/advisories/GHSA-g4cf-xj29-wqqr

github.com/parse-community/parse-server/pull/10270

github.com/parse-community/parse-server/pull/10271

github.com/...ommit/40eb442e02672986730007d0a1edb22c1c4bd357

github.com/...ommit/fbac847499e57f243315c5fc7135be1d58bb8e54

cve.org (CVE-2026-33538)

nvd.nist.gov (CVE-2026-33538)

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