> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/appsec-rules/iac-security/public-exposure/appsec-openapi-2.md).

# OpenAPI If the security scheme is not of type 'oauth2', the array value must be empty misconfigurati

## Rule Details

|                        |                        |
| ---------------------- | ---------------------- |
| Cortex AppSec Rule ID  | APPSEC\_OPENAPI\_2     |
| Category - Subcategory | Public Exposure - APIs |
| Provider               | OTHER                  |
| Severity               | HIGH                   |
| Framework              | OpenAPI                |

## Impact

Restrict the security section of OpenAPI documents to only include OAuth 2.0 authorization schemes defined in the security definitions section to prevent unauthorized access to the API. This is achieved by ensuring that only OAuth 2.0 schemes defined in the security section have a value.

## How to Fix

To fix this issue, you need to modify the specification of your OAuth2 authentication to not use 'password' flow. This is because 'password' flow of OAuth2 authentication is less secure compared to other flows like 'authorization\_code', 'implicit', etc.

## The above code is secure because it uses 'implicit' and 'authorizationCode' flows of OAuth2 authentication instead of the 'password' flow. Both 'implicit' and 'authorizationCode' flows are OAuth2's response types that are more secure than the 'password' flow. 'implicit' flow is recommended for applications whose server side components are not capable of maintaining the confidentiality of the client secret while 'authorizationCode' flow is used when the client is confidential (can keep a secret) and maintains a server-side component. \[source,go]

## components: securitySchemes: OAuth2: type: oauth2 flows: implicit: authorizationUrl: <http://api.example.com/auth> scopes: read: Grants read access write: Grants write access authorizationCode: authorizationUrl: <http://api.example.com/auth> tokenUrl: <http://api.example.com/token> scopes: admin: Grants access to admin operations


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://cortex-docs.paloaltonetworks.com/appsec-rules/iac-security/public-exposure/appsec-openapi-2.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.