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CVE-2026-33538GHSA-G4CF-XJ29-WQQRBIT-PARSE-2026-33538

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 8.6.58, 9.6.0-alpha.52
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • parse-community parse-server

    fixed in 8.6.58; From 9.0.0 · fixed in 9.6.0-alpha.52

  • parse-servernpm

    From 9.0.0 · fixed in 9.6.0-alpha.52

  • parse-servernpm

    fixed in 8.6.58

References 5

GitHub · parse-community/parse-server