Pull Request resolves # .

• I read the Generative AI policy and my contribution is either not created with the help of AI or is compatible with the policy and GNU/GPL 2 or later.

Summary of Changes

This pull request (PR) fixes one high severity security vulnerability in the indirect NPM non-development dependency "flatted" reported by npm audit by using npm audit fix.

it is the same as PR #47406 for 5.4-dev.

In the 6.0-dev branch this has already been done with commit a305da2 in the upmerge PR #47402 .

Testing Instructions

It needs a development environment with a git clone, composer and npm.

1. If not done before, run composer install and npm ci.
2. Run npm audit.
3. Check the result.

Actual result BEFORE applying this Pull Request

# npm audit report

flatted  <3.4.0
Severity: high
flatted vulnerable to unbounded recursion DoS in parse() revive phase - https://github.com/advisories/GHSA-25h7-pfq9-p65f
fix available via `npm audit fix`
node_modules/flatted

1 high severity vulnerability

To address all issues, run:
  npm audit fix

Expected result AFTER applying this Pull Request

found 0 vulnerabilities

Link to documentations

Please select:

• Documentation link for guide.joomla.org:

• No documentation changes for guide.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed