BIT-PARSE-2026-34573 Parse Server: GraphQL complexity validator exponential fragment traversal DoS

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, 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 singl...

parse-server has GraphQL complexity validator exponential fragment traversal DoS

Impact 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...

GHSA-MFJ6-6P54-M98C parse-server has GraphQL complexity validator exponential fragment traversal DoS

Impact 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...

CVE-2026-34573 Parse Server: GraphQL complexity validator exponential fragment traversal DoS

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...

CVE-2026-34573

Parse Server exposes a denial-of-service when the GraphQL query complexity validator is enabled (requestComplexity.graphQLDepth or requestComplexity.graphQLFields). In versions prior to 8.6.68 and 9.7.0-alpha.12, a crafted query using binary fan-out fragment spreads can block the Node.js event lo...