CVE-2021-41580

The passport-oauth2 package before 1.6.1 for Node.js mishandles the error condition of failure to obtain an access token. This is exploitable in certain use cases where an OAuth identity provider uses an HTTP 200 status code for authentication-failure error reports, and an application grants authorization upon simply receiving the access token (i.e., does not try to use the token). NOTE: the passport-oauth2 vendor does not consider this a passport-oauth2 vulnerability

• https://github.com/jaredhanson/passport-oauth2/commit/8e3bcdff145a2219033bd782fc517229fe3e05eaPatch, Third Party Advisory
• https://github.com/jaredhanson/passport-oauth2/compare/v1.6.0...v1.6.1Patch, Third Party Advisory
• https://github.com/jaredhanson/passport-oauth2/pull/144Patch, Third Party Advisory
• https://github.com/jaredhanson/passport-oauth2/commit/8e3bcdff145a2219033bd782fc517229fe3e05eaPatch, Third Party Advisory
• https://github.com/jaredhanson/passport-oauth2/compare/v1.6.0...v1.6.1Patch, Third Party Advisory
• https://github.com/jaredhanson/passport-oauth2/pull/144Patch, Third Party Advisory

Published

Sep 27, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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