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.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-p9xr-7p9p-gpqx Feathers has a NoSQL Injection via WebSocket id Parameter in MongoDB Adapter
Fixes

Solution

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Workaround

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History

Tue, 10 Mar 2026 20:15:00 +0000

Type Values Removed Values Added
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.
Title NoSQL Injection via WebSocket id Parameter in MongoDB Adapter
Weaknesses CWE-943
References
Metrics cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-10T20:08:52.109Z

Reserved: 2026-03-04T16:26:02.900Z

Link: CVE-2026-29793

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-03-10T20:16:39.437

Modified: 2026-03-10T20:16:39.437

Link: CVE-2026-29793

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses