26 lines
937 B
Python
26 lines
937 B
Python
# Copyright (c) 2023-present Plane Software, Inc. and contributors
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# SPDX-License-Identifier: AGPL-3.0-only
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# See the LICENSE file for details.
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# CSV utility functions for safe export
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# Characters that trigger formula evaluation in spreadsheet applications
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_CSV_FORMULA_TRIGGERS = frozenset(("=", "+", "-", "@", "\t", "\r", "\n"))
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def sanitize_csv_value(value):
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"""Sanitize a value for CSV export to prevent formula injection.
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Prefixes string values starting with formula-triggering characters
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with a single quote so spreadsheet applications treat them as text
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instead of evaluating them as formulas.
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See: https://owasp.org/www-community/attacks/CSV_Injection
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"""
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if isinstance(value, str) and value and value[0] in _CSV_FORMULA_TRIGGERS:
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return "'" + value
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return value
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def sanitize_csv_row(row):
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"""Sanitize all values in a CSV row."""
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return [sanitize_csv_value(v) for v in row]
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