Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Feathersjs | Feathers | >= 5.0.0, < 5.0.42 |
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-29793?
CVE-2026-29793 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 i...
How severe is CVE-2026-29793?
CVE-2026-29793 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-29793?
Check the references section above for vendor advisories and patch information. Affected products include: Feathersjs Feathers.