Environment

eslint version: v9.14.0

What parser are you using?

Default (Espree)

What did you do?

I have config file inside: /app/eslint.config.mjs and want to lint files inside /tmp/example.js

root@container:/app npx eslint --flag unstable_config_lookup_from_file -c "./eslint.config.mjs" /tmp/example.js

/tmp/example.js
  0:0  warning  File ignored because outside of base path

What did you expect to happen?

behaviour as before version 9.0, should check the file

What actually happened?

File ignored because outside of base path

Link to Minimal Reproducible Example

https://github.com/Peredery/eslint_bug_report_-File-ignored-because-outside-of-base-path

Participation

• I am willing to submit a pull request for this issue.

Additional comments

Context "Why I need this behaviors": #18806 (reply in thread)