OAuth Vulnerability in Feathersjs Framework Affecting Web API Development
CVE-2026-29792

9.3CRITICAL

Key Information:

Vendor

Feathersjs

Status
Feathers
Authentication-oauth
Vendor
CVE Published:
10 March 2026

What is CVE-2026-29792?

A specific vulnerability in the Feathersjs framework allows unauthenticated attackers to exploit a flawed fallback mechanism in OAuth authentication. Attackers can send a specially crafted GET request to the /oauth/:provider/callback endpoint, including a forged profile in the query string. If the authentication flow lacks the expected session state, the system resorts to utilizing raw query parameters, permitting the attacker to generate a valid access token for any existing user without requiring authorization from the OAuth provider. This flaw has been addressed in version 5.0.42.

Affected Version(s)

authentication-oauth >= 5.0.0, < 5.0.42

feathers >= 5.0.0, < 5.0.42

References

https://github.com/feathersjs/feathers/security/advisorie...
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CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.