Files
codeql/python/ql/test/query-tests/Security/CWE-022-PathInjection/flask_path_injection.py
Owen Mansel-Chan 5a97348e78 python: Inline expectation should have space after $
This was a regex-find-replace from `# \$(?! )` (using a negative lookahead) to `# $ `.
2026-03-04 12:45:05 +00:00

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Python

from flask import Flask, request, send_from_directory # $ Source
app = Flask(__name__)
STATIC_DIR = "/server/static/"
# see https://flask.palletsprojects.com/en/1.1.x/api/#flask.send_from_directory
@app.route("/provide-filename")
def download_file():
filename = request.args.get('filename', '')
# ok since `send_from_directory` ensure this stays within `STATIC_DIR`
return send_from_directory(STATIC_DIR, filename) # $ result=OK
# see https://flask.palletsprojects.com/en/1.1.x/api/#flask.send_from_directory
@app.route("/also-provide-dirname")
def download_file():
dirname = request.args.get('dirname', '')
filename = request.args.get('filename', '')
return send_from_directory(dirname, filename) # $ Alert