Is there an existing issue for this?

• I have searched the existing issues

Current behavior

I was following this guide to setup swagger ui: https://docs.nestjs.com/openapi/introduction

However, when I set the path in SwaggerModule.setup to 'api-docs', I see the browser looks for assets in (for example) http://localhost:8000/api-docs/api-docs/swagger-ui.css. It is incorrect path and returns 404 not found.

It does not happen when I set any other value, for example, 'docs' gives me http://localhost:8000/docs/swagger-ui.css, which is the correct behavior.

Minimum reproduction code

https://docs.nestjs.com/openapi/introduction

Steps to reproduce

No response

Expected behavior

'api-docs' should not be duplicated

NestJS version

11.0.1

Packages versions

[System Information]
OS Version : Linux6.14.0-33-generic
NodeJS Version : v24.9.0
(node:17880) [DEP0190] DeprecationWarning: Passing args to a child process with shell option true can lead to security vulnerabilities, as the arguments are not escaped, only concatenated.
(Use node --trace-deprecation ... to show where the warning was created)
PNPM Version : 10.18.0

[Nest CLI]
Nest CLI Version : 11.0.10

[Nest Platform Information]
platform-express version : 11.1.8
schematics version : 11.0.9
swagger version : 11.2.1
testing version : 11.1.8
common version : 11.1.8
config version : 4.0.2
core version : 11.1.8
cli version : 11.0.10

Node.js version

24.9.0

In which operating systems have you tested?

• macOS
• Windows
• Linux

Other

No response