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CVE-2026-34573

Parse Server: GraphQL complexity validator exponential fragment traversal DoS PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
parse-community / parse-serveraffected < 8.6.68; affected >= 9.0.0, < 9.7.0-alpha.12

CWE

CWE-407

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.