CVE-2026-29793 — Vulnerability in @feathersjs/mongodb — CVE Details

CRITICAL

Feathers has a NoSQL Injection via WebSocket id Parameter in MongoDB Adapter

Published March 10, 2026Updated March 13, 2026Source: osv

Summary

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.

Advisory Timeline

First published March 10, 2026 (216 days ago).
Last revised March 13, 2026 — 2 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

npm

Update @feathersjs/mongodb to 5.0.42 or later

npm install @feathersjs/mongodb@5.0.42

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: npm (1).

Package	Ecosystem	Affected	Fixed In
@feathersjs/mongodb	npm	All versions	5.0.42

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-943
View on MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

—

Confidentiality

—

Integrity

—

Availability

—

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

References

Frequently Asked Questions

What is CVE-2026-29793?: Feathers has a NoSQL Injection via WebSocket id Parameter in MongoDB Adapter This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2026-29793?: CVE-2026-29793 affects @feathersjs/mongodb. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-29793 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-p9xr-7p9p-gpqx

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