A Python Package for Safe SVG Sanitization

Securing SVG Files with py-svg-hush: A Python Package for Safe SVG Sanitization

SVG files are widely used in web applications for their scalability and versatility. However, these files can also pose security risks if not properly sanitized. Malicious SVG files can contain scripts or attributes that can lead to code execution or cross-site scripting attacks.

To address this issue, the py-svg-hush package offers a robust solution for sanitizing SVG files. By leveraging the svg-hush Rust library, py-svg-hush provides a Python interface that removes potentially malicious elements and attributes from SVG files, ensuring they are safe for rendering.

Installation and Usage

Getting started with py-svg-hush is straightforward. Simply install the package using pip:

bash
pip install py-svg-hush

Once installed, you can begin sanitizing SVG files using the filter_svg function. This function takes the SVG data as input and removes any potentially malicious elements or attributes:

“`python
from py_svg_hush import filter_svg

svg_bytes = b”””

alert(‘Malicious script’)

“””

sanitized_svg = filter_svg(svg_bytes)
“`

Additionally, you can provide a dictionary of allowed MIME types and subtypes for data: URLs in the SVG. Any data: URLs with MIME types or subtypes not in the dictionary will be dropped:

“`python
keep_data_url_mime_types = {
“image”: [“jpeg”, “png”, “gif”],
}

sanitized_svg = filter_svg(svg_bytes, keep_data_url_mime_types)
“`

Development Environment Setup

If you are interested in contributing to py-svg-hush or simply want to explore its codebase, you can set up a development environment using the following steps:

1. Clone the repository:

bash
git clone git@github.com:jams2/py-svg-hush.git

1. Install development dependencies:

bash
pip install .[dev,testing]

1. Build the Rust library, resulting in a Python module:

bash
maturin develop

1. Run tests to ensure everything is functioning correctly:

bash
pytest

Conclusion

Securing SVG files is crucial to prevent potential security breaches in web applications. With py-svg-hush, you have a reliable and efficient tool for sanitizing SVG files and mitigating risks. By leveraging the power of the svg-hush Rust library, py-svg-hush delivers a seamless and effective solution for ensuring the safety of your SVG files in Python projects.

If you want to learn more about py-svg-hush or get involved in its development, check out the official repository. Start securing your SVG files today and ensure the digital safety of your web applications.

References

• py-svg-hush GitHub Repository
• svg-hush Rust Library