python-liquid: Absolute paths escape filesystem loader search path

        if os.path.pardir in template_path.parts or template_path.is_absolute():
            raise TemplateNotFoundError(template_name)

import os
from pathlib import Path

from liquid import Environment
from liquid import FileSystemLoader
from liquid.exceptions import TemplateNotFoundError


class MyFileSystemLoader(FileSystemLoader):
    def resolve_path(self, template_name: str) -> Path:
        template_path = Path(template_name)

        if self.ext and not template_path.suffix:
            template_path = template_path.with_suffix(self.ext)

        if os.path.pardir in template_path.parts or template_path.is_absolute():
            raise TemplateNotFoundError(template_name)

        for path in self.search_path:
            source_path = path.joinpath(template_path)
            if not source_path.exists():
                continue
            return source_path

        raise TemplateNotFoundError(template_name)


env = Environment(loader=MyFileSystemLoader("path/to/templates/"))