CVE-2026-29792

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, an unauthenticated attacker can send a crafted GET request directly to /oauth/:provider/callback with a forged profile in the query string. The OAuth service's authentication payload has a fallback chain that reaches params.query (the raw request query) when Grant's session/state responses are empty. Since the attacker never initiated an OAuth authorize flow, Grant has no session to work with and produces no response, so the fallback fires. The forged profile then drives entity lookup and JWT minting. The attacker gets a valid access token for an existing user without ever contacting the OAuth provider. This vulnerability is fixed in 5.0.42.

• CWE-287

• https://github.com/feathersjs/feathers/security/advisories/GHSA-wg9x-qfgw-pxhjVendor Advisory

Published

Mar 10, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-29787mcp-memory-service is an open-source memory backend for mult…5.3
• CVE-2026-29788TSPortal is the WikiTide Foundation’s in-house platform used…7.5
• CVE-2026-29789Vito is a self-hosted web application that helps manage serv…8.8
• CVE-2026-2979A flaw has been found in FastApiAdmin up to 2.2.0. This issu…8.8
• CVE-2026-29790dbt-common is the shared common utilities for dbt-core and a…5.3
• CVE-2026-29791Agentgateway is an open source data plane for agentic AI con…6.5
• CVE-2026-29793Feathersjs is a framework for creating web APIs and real-tim…9.8
• CVE-2026-29794Vikunja is an open-source self-hosted task management platfo…5.3
• CVE-2026-29795stellar-xdr is a library and CLI containing types and functi…7.5
• CVE-2026-29796WebSocket endpoints lack proper authentication mechanisms, e…9.8
• CVE-2026-2980A vulnerability has been found in UTT HiPER 810G up to 1.7.7…7.3
• CVE-2026-2981A vulnerability was found in UTT HiPER 810G up to 1.7.7-1711…8.8