[ISSUE]: Default Content-Type Mismatch in security_parsers.py #394

Description

Description:
In validate_content_type() function in backend/security_parsers.py, the docstring states that allowed_types defaults to ['application/json', 'application/x-www-form-urlencoded'], but the actual code only sets the default to ['application/json']:

# Docstring says (line 28-29):
# If None, defaults to ['application/json', 'application/x-www-form-urlencoded']

# But actual code (line 38-39):
if allowed_types is None:
    allowed_types = ['application/json']

This inconsistency can cause confusion and potential security issues when form data is submitted.

Steps to fix:

1. Open backend/security_parsers.py
2. Find the validate_content_type() function
3. Change line 38-39 from:

   if allowed_types is None:
       allowed_types = ['application/json']

   To:

   if allowed_types is None:
       allowed_types = ['application/json', 'application/x-www-form-urlencoded']

Additional Context

No response