Open-source Authentication Server Vulnerability in Authorizer
CVE-2026-54072

9.3CRITICAL

Key Information:

Vendor

Authorizerdev

Status
Authorizer
Vendor
CVE Published:
11 September 2026

What is CVE-2026-54072?

Authorizer, an open-source authentication and authorization server, contains a vulnerability in its /authorize endpoint prior to version 2.2.1. This vulnerability allows unauthenticated attackers to supply any redirect_uri without validation against AllowedOrigins. If the response_type is set to either token or id_token, an attacker can redirect users to a malicious website with sensitive tokens exposed in the query parameters. Although a partial fix was implemented in version 2.0.1 for various other handlers, the /authorize endpoint remained vulnerable until version 2.2.1, where a more comprehensive solution was implemented.

Affected Version(s)

authorizer < 2.2.1

References

https://github.com/authorizerdev/authorizer/security/advi...
x_refsource_CONFIRM

CVSS V3.1

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.