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CVE-2026-54072— Authorizer: Unvalidated redirect_uri in /authorize leaks OAuth2 tokens to attacker-controlled URL

Quick assessment

Affected
authorizerdev authorizer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Authorizer是authorizer组织的一款为应用提供身份认证与权限管理服务的软件。 Authorizer 2.2.1之前版本存在输入验证错误漏洞，该漏洞源于/authorize端点未验证redirect_uri是否在AllowedOrigins中，当response_type为token或id_token时，服务器会将access_token、id_token和refresh_token作为查询参数附加并重定向至攻击者提供的URL，未经验证的攻击者可获取client_id，导致凭据泄露。

CVSS 9.3 · Critical EPSS 0.46% · P40

Affected Version Matrix 1

VendorProduct Version RangeStatus
authorizerdev authorizer < 2.2.1 affected
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I. Basic Information for CVE-2026-54072

Vulnerability Information
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Vulnerability Title
Authorizer: Unvalidated redirect_uri in /authorize leaks OAuth2 tokens to attacker-controlled URL
Source: CVE Program / CVE List V5
Vulnerability Description
Authorizer is an open-source, self-hostable authentication and authorization server. Prior to version 2.2.1, the `/authorize` endpoint accepts any `redirect_uri` without validating it against `AllowedOrigins`. When `response_type=token` or `response_type=id_token`, the server appends `access_token`, `id_token`, and `refresh_token` as query parameters and issues a 302 redirect to the attacker-supplied URL. An unauthenticated attacker can obtain the required `client_id` from the public `/graphql?query={meta{client_id}}` endpoint. A partial fix was applied in v2.0.1 to other handlers (`oauth_login`, `verify_email`, `magic_link_login`, `forgot_password`, `invite_members`, `oauth_callback`) but `/authorize` was not included. Version 2.2.1 contains a more complete fix.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
Authorizer 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Authorizer是authorizer组织的一款为应用提供身份认证与权限管理服务的软件。 Authorizer 2.2.1之前版本存在输入验证错误漏洞，该漏洞源于/authorize端点未验证redirect_uri是否在AllowedOrigins中，当response_type为token或id_token时，服务器会将access_token、id_token和refresh_token作为查询参数附加并重定向至攻击者提供的URL，未经验证的攻击者可获取client_id，导致凭据泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
authorizerdev authorizer < 2.2.1 -

II. Public POCs for CVE-2026-54072

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III. Intelligence Information for CVE-2026-54072

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Vendor Advisories for CVE-2026-54072 (1)

IV. Related Vulnerabilities

Same product: authorizer
Same vendor: authorizerdev
Same weakness: CWE-601