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security: sanitize fetch parameter in /download endpoint using secure_filename (fixes #358) #403

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Merged
pradeeban merged 1 commit into from
Feb 19, 2026
Merged

security: sanitize fetch parameter in /download endpoint using secure_filename (fixes #358) #403

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5 changes: 5 additions & 0 deletions fri/server/main.py
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Original file line number Diff line number Diff line change
Expand Up @@ -433,6 +433,11 @@ def download(dir):
if not download_file:
abort(400, description="Missing file parameter")

download_file = secure_filename(download_file)

if download_file == "":
abort(400, description="Invalid filename")

# Normalize the requested file path
safe_path = os.path.normpath(download_file)

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