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Critical · 9.3 CVE-2026-29793 EUVD-2026-10827GHSA-p9xr-7p9p-gpqx

NoSQL Injection via WebSocket id Parameter in MongoDB Adapter

Published Mar 10, 2026 · Updated Mar 11, 2026 · Assigned by GitHub_M

Description

Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. From 5.0.0 to before 5.0.42, Socket.IO clients can send arbitrary JavaScript objects as the id argument to any service method (get, patch, update, remove). The transport layer performs no type checking on this argument. When the service uses the MongoDB adapter, these objects pass through getObjectId() and land directly in the MongoDB query as operators. Sending {$ne: null} as the id matches every document in the collection. This vulnerability is fixed in 5.0.42.

Affected products

VendorProductAffectedFixed
@feathersjs mongodb >= 5.0.0, < 5.0.42 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm @feathersjs/mongodb >= 5.0.0, < 5.0.42 5.0.42 GHSA-p9xr-7p9p-gpqx

References