Use of unsanitized data to issue SQL queries

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Metadata

ID: python-flask/sqlalchemy-injection

Language: Python

Severity: Error

Category: Security

Description

Use of unsanitized data from incoming requests in SQL queries may lead to SQL injections. Instead, the data should be filtered and sanitized before use, making sure all potential SQL injections are avoided.

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Non-Compliant Code Examples

import flask
import requests

app = flask.Flask(__name__)



@app.route("/route/to/resource/<resource_id>")
def resource2(resource_id):
    file1 = query.order_by(resource_id)
    file2 = query.having(f"{resource_id}")

@app.route("/route/to/resource/<resource_id>")
def resource3(resource_id):
    file3 = query.filter("{0}".format(resource_id))


@app.route("/route/to/resource")
def resource2():
    resource_id = flask.request.args.get("resource_id")
    file1 = query.group_by(resource_id)

Compliant Code Examples

import flask
import requests

app = flask.Flask(__name__)

@app.route("/route/to/resource")
def resource2():
    resource_id = flask.request.args.get("resource_id")
    file1 = query.group_by(sanitize(resource_id))
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