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CVE-2026-34573

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/31/2026

Last Modified4/2/2026

Sourcenvd

Honeypot Sightings0

Affected Products

parseplatform:parse-server

Weaknesses (CWE)

CWE-407

References

https://github.com/parse-community/parse-server/commit/ea15412795f34594cc8a674fe858d445675e0295(security-advisories@github.com)

https://github.com/parse-community/parse-server/commit/f759bda075298ec44e2b4fb57659a0c56620483b(security-advisories@github.com)

https://github.com/parse-community/parse-server/pull/10344(security-advisories@github.com)

https://github.com/parse-community/parse-server/pull/10345(security-advisories@github.com)

https://github.com/parse-community/parse-server/security/advisories/GHSA-mfj6-6p54-m98c(security-advisories@github.com)

IOC Correlations

No correlations recorded

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