This depends entirely on what you do with the input from the webform. In normal use the form gets encoded as x-www-form-urlencoded or json -- Both formats which can be deserialized into a python dictionary completely safely. Of course, they could be deserialized in unsafe ways too -- Make sure that you use libraries that are dedicated to handling this properly (e.g. urlparse or json).
From there, whether the input is safe depends entirely on what the application does with it. (e.g. it is not safe if the application uses eval with input based on the decoded dict).
As for automated testing for this -- I don't know of any way to accomplish this, but these problems are generally pretty easy to mitigate by just following normal best-practices (don't eval code you don't trust, etc. etc.)
Snyk
snyk.io › blog › code-injection-python-prevention-examples
Code injection in Python: examples and prevention | Snyk
December 6, 2023 - By exploiting vulnerabilities, an attacker can inject harmful code, leading to severe consequences, such as unauthorized data access, financial fraud, or total system takeover. These vulnerabilities often occur when an application mishandles user input. For example, insecure use of functions like eval() in Python without proper validation can lead to code injection.
Semgrep
semgrep.dev › write rules › secure coding › python › code injection in python
Code Injection in Python | Semgrep
The _xxsubinterpreters.run_string is an internal Python function that interprets the string as Python code. This causes a code injection vulnerability when unverified user data reaches run_string.
Videos
32:37
Stop Hardcoding Everything: Use Dependency Injection - YouTube
14:43
Should You Use Dependency Injection Frameworks? - YouTube
07:11
Dependency Injection Explained in 7 Minutes - YouTube
23:41
[4K] Cybersecurity Programming: Build SQL Injection Scanner ...
10:24
PYTHON Game Hacking Just Got REAL With Python Interpreter Injection ...
15:10
QUESTIONABLE Object Creation Patterns in Python 🤔 - YouTube
Ets-labs
python-dependency-injector.ets-labs.org › introduction › di_in_python.html
Dependency injection and inversion of control in Python — Dependency Injector 4.48.3 documentation
This page describes a usage of the dependency injection and inversion of control in Python. It contains Python examples that show how to implement dependency injection. It demonstrates a usage of the dependency injection framework Dependency Injector, its container, Factory, Singleton and Configuration providers.
GitHub
github.com › 100nm › python-injection
GitHub - 100nm/python-injection: Dead-simple dependency injection framework for Python. · GitHub
Dead-simple dependency injection framework for Python. - 100nm/python-injection
Author 100nm
StackHawk
stackhawk.com › stackhawk, inc. › vulnerabilities and remediation › preventing command injection in python: a guide to security
Preventing Command Injection in Python: A Guide to Security
January 13, 2025 - An overview of command injection in python with examples and best security practices including tips on how to find & fix this vulnerability.
PortSwigger
portswigger.net › kb › issues › 00100f10_python-code-injection
Python code injection - PortSwigger
Python code injection · Twitter WhatsApp Facebook Reddit LinkedIn Email · Server-side code injection vulnerabilities arise when an application incorporates user-controllable data into a string that is dynamically evaluated by a code interpreter. If the user data is not strictly validated, an attacker can use crafted input to modify the code to be executed, and inject arbitrary code that will be executed by the server.
DataCamp
datacamp.com › tutorial › python-dependency-injection
Python Dependency Injection: A Guide for Cleaner Code Design | DataCamp
July 24, 2025 - Experienced data science instructor and Biostatistician with expertise in Python, R, and machine learning. Dependency injection is a design pattern that enables you to write cleaner code by creating dependencies within a class, which can be passed from outside, making your code easier to manage ...
Blogger
sethsec.blogspot.com › 2016 › 11 › exploiting-python-code-injection-in-web.html
Exploiting Python Code Injection in Web Applications
November 20, 2016 - Together with my colleague Charlie Worrell (@decidedlygray), we were able to turn the Burp POC (sleep for 20 seconds) into a non interactive shell, which is what this post covers. Python code injection is a subset of server-side code injection, as ...
SecureFlag
knowledge-base.secureflag.com › vulnerabilities › code_injection › os_command_injection_python.html
OS Command Injection in Python | SecureFlag Security Knowledge Base
August 5, 2025 - The following snippet contains a Flask web application written in Python that executes the nslookup command to resolve the host supplied by the user. @app.route("/dns") def page(): hostname = request.values.get(hostname) cmd = 'nslookup ' + hostname return subprocess.check_output(cmd, shell=True) Since the hostname is simply appended to the command and executed on a subshell with shell=True, an attacker could stack another command using ; in the file_path GET parameter to inject additional commands.
PyPI
pypi.org › project › inject
inject · PyPI
Python dependency injection framework.
» pip install inject
Armur
armur.ai › blogs › posts › code_injection_in_python
Code Injection in Python: Examples and Prevention | Armur
Understanding these concepts is crucial for developing secure Python applications. Code injection is a technique used by malicious actors to introduce unauthorized code into a vulnerable application.
Reddit
reddit.com › r/python › dependency injection in python?
r/Python on Reddit: Dependency Injection in Python?
November 24, 2022 -
Once and for all, I want to learn the answer for this question, there are a lot of python developers arguing that DI is Java/C# thing only, but I also find people who said that they use DI in python and other dynamic languages (e.g. php). Did you ever used dependency injection in python (it would be good if you could provide example)? Does DI required in dynamic world? Should average python developer learn how to use it? What's in other dynamic languages (php, ruby etc) with DI?
Top answer 1 of 11
4
https://python-dependency-injector.ets-labs.org/introduction/di_in_python.html first result in google. In short - DI i not a problem in python. You can add methods not only to classes, but to instance. Even magic methods. Num.str = customStrFunction
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My favorite way to implement DI in python is to define a class with a class variable that holds something with a lightweight default. For example, I like to create a service class that holds a reference to a repository (data access) class that is used in data manipulation operations. I always default to some in memory data structure that is basically dict, and at runtime I can swap it out with a sql based repo or a mongo based repo where they all conform to the same abstract base class.
Medium
medium.com › @spraneeth4 › python-dependency-injector-simplifying-dependency-injection-in-your-projects-14385af0bf78
Python Dependency Injector: Simplifying Dependency Injection in Your Projects | by praneeth_vvs | Medium
September 27, 2024 - Dependency injection might sound intricate at first, but its premise is simple and powerful: to externalize the creation and binding of dependencies from the classes that use them.
GitHub
github.com › python-injector › injector
GitHub - python-injector/injector: Python dependency injection framework, inspired by Guice · GitHub
Python dependency injection framework, inspired by Guice - python-injector/injector
Starred by 1.5K users
Forked by 98 users
Languages Python
GeeksforGeeks
geeksforgeeks.org › python › what-is-a-pythonic-way-for-dependency-injection
What is a Pythonic Way for Dependency Injection? - GeeksforGeeks
July 15, 2024 - Follow these ideas to guarantee DI implementations are Pythonic: Explicit is superior to implicit: Specify exactly where and how dependencies are introduced. Simple is better than complicated. Steer clear of too ambitious DI solutions. Count of readable words: Create easily readable and understandable codes for others. Constructor Injection is supplying dependencies via a class's initializer, __init__ method.
GitHub
github.com › sethsec › PyCodeInjection
GitHub - sethsec/PyCodeInjection: Automated Python Code Injection Tool · GitHub
Automated Python Code Injection Tool. Contribute to sethsec/PyCodeInjection development by creating an account on GitHub.
Starred by 87 users
Forked by 23 users
Languages Python 96.8% | HTML 2.1% | Shell 1.1%
PyPI
pypi.org › project › python-injection
python-injection · PyPI
Dead-simple dependency injection framework for Python.
» pip install python-injection
Published Feb 03, 2026
Version 0.25.15
Snyk
snyk.io › blog › dependency-injection-python
Dependency injection in Python | Snyk
October 31, 2023 - Imagine you're diving into a Python application. Inside, there's a class named DatabaseClient that needs specific details to connect to a database. Now, if you were to put these details inside the class directly, it would be like a car with tires that can't ever be changed. But with DI, instead of locking those details in, you provide (or inject) them from outside.
BreakInSecurity
axcheron.github.io › code-injection-with-python
Code Injection with Python - BreakInSecurity
December 29, 2017 - How to inject a backdoor into a PE file with Python.