CVE-2026-33538

HIGH EPSS 32.4%
Published Mar 24, 20263mo ago · Modified Jun 17, 20261w ago
8.7 CVSS 4.0
High
Find Similar
Published Mar 24, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
8.7
Exploitability
Impact
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
32.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-400 Uncontrolled Resource Consumption Resource Mgmt

Affected Products 53

VendorProductVersionRange
parseplatformparse-server* <8.6.58
parseplatformparse-server*≥9.0.0  –  <9.6.0
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any
parseplatformparse-server9.6.0any

References 5

  • github.com https://github.com/parse-community/parse-server/commit/40eb442e02672986730007d0a1edb22c1c4bd357
    Patch
  • github.com https://github.com/parse-community/parse-server/commit/fbac847499e57f243315c5fc7135be1d58bb8e54
    Patch
  • github.com https://github.com/parse-community/parse-server/pull/10270
    Issue Tracking
  • github.com https://github.com/parse-community/parse-server/pull/10271
    Issue Tracking
  • github.com https://github.com/parse-community/parse-server/security/advisories/GHSA-g4cf-xj29-wqqr
    Vendor Advisory

Remediation

  • github.com https://github.com/parse-community/parse-server/commit/40eb442e02672986730007d0a1edb22c1c4bd357
    Patch
  • github.com https://github.com/parse-community/parse-server/commit/fbac847499e57f243315c5fc7135be1d58bb8e54
    Patch