Use of unsanitized data to issue SQL queries

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Metadata

ID: python-flask/sqlalchemy-injection

Language: Python

Severity: Error

Category: Security

CWE: 89

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.

Learn More

CWE-89: Improper Neutralization of Special Elements used in an SQL Command

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))