Fix code scanning alert no. 13: Inefficient regular expression #1542
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Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com> Signed-off-by: Priyankar Pal <[email protected]>
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Fixes https://github.com/reactplay/react-play/security/code-scanning/13
To fix the problem, we need to modify the regular expression to avoid nested quantifiers that can lead to exponential backtracking. We can achieve this by restructuring the regular expression to eliminate ambiguity and ensure linear time complexity.
^(?:[0-9]+[-+*/]?)*[0-9]*$^(?:[0-9]+[-+*/])*[0-9]*$This change ensures that the repeated group
(?: ... )*does not contain nested quantifiers, thus avoiding the potential for exponential backtracking.Suggested fixes powered by Copilot Autofix. Review carefully before merging.