CVE-2026-29792
OAuth Callback Injection in Feathersjs Allows Unauthorized Access
Publication date: 2026-03-10
Last updated on: 2026-03-19
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| feathersjs | feathers | From 5.0.0 (inc) to 5.0.42 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-287 | When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability affects Feathersjs versions from 5.0.0 to before 5.0.42. An unauthenticated attacker can send a specially crafted GET request to the /oauth/:provider/callback endpoint with a forged profile included in the query string. Because the OAuth service's authentication payload falls back to using the raw request query when there is no session or state response from Grant, the attacker can bypass the normal OAuth authorization flow. This allows the attacker to obtain a valid access token for an existing user without ever contacting the OAuth provider.
How can this vulnerability impact me? :
The vulnerability allows an attacker to impersonate an existing user by obtaining a valid access token without proper authentication. This can lead to unauthorized access to user accounts and sensitive data, potentially compromising the security and integrity of applications using the affected Feathersjs versions.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should upgrade Feathersjs to version 5.0.42 or later, where the issue has been fixed.