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VULNERABILITIES

CVE-2026-34573 Details

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.68 and 9.7.0-alpha.12, the GraphQL query complexity validator can be exploited to cause a denial-of-service by sending a crafted query with binary fan-out fragment spreads. A single unauthenticated request can block the Node.js event loop for seconds, denying service to all concurrent users. This only affects deployments that have enabled the requestComplexity.graphQLDepth or requestComplexity.graphQLFields configuration options. This issue has been patched in versions 8.6.68 and 9.7.0-alpha.12.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/parse-community/parse-server/commit/ea15412795f34594cc8a674fe858d445675e0295 [email protected]Patch
https://github.com/parse-community/parse-server/commit/f759bda075298ec44e2b4fb57659a0c56620483b [email protected]Patch
https://github.com/parse-community/parse-server/pull/10344 [email protected]Issue TrackingPatch
https://github.com/parse-community/parse-server/pull/10345 [email protected]Issue TrackingPatch
https://github.com/parse-community/parse-server/security/advisories/GHSA-mfj6-6p54-m98c [email protected]PatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-407Inefficient Algorithmic Complexity[email protected]

Affected Products

ProductVersions
parseplatform parse-server
< 8.6.68
>= 9.0.0, < 9.7.0
9.7.0 alpha1
9.7.0 alpha10
9.7.0 alpha11

CPE

  • cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*
  • cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha1:*:*:*:node.js:*:*
  • cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha10:*:*:*:node.js:*:*
  • cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha11:*:*:*:node.js:*:*
  • cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha2:*:*:*:node.js:*:*
  • cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha3:*:*:*:node.js:*:*
  • cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha4:*:*:*:node.js:*:*
  • cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha5:*:*:*:node.js:*:*
  • cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha6:*:*:*:node.js:*:*
  • cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha7:*:*:*:node.js:*:*
  • cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha8:*:*:*:node.js:*:*
  • cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha9:*:*:*:node.js:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-34573
NVD Published Date:
Mar 31, 2026
NVD Last Modified:
Jul 24, 2026
Source:
[email protected]
CVE-2026-34573 Details - Not Deferred