chore(vulnerability): Inefficient Regular Expression - Potential high time complexity leading to ReDoS #10315
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… time complexity leading to ReDoS (#10315)
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… time complexity leading to ReDoS (datahub-project#10315)
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const URLPattern = new RegExp(/^(?:http(s)?://)?[\w.-]+(?:.
[\w.-]+)+[\w-._~:/?#[]@!$&'()*+,;=.]+$/);This part of the regular expression may cause exponential backtracking on strings starting with '-.' and containing many repetitions of '-.'.
References of the Vulnerability and Weaknesses
The current expression
[\w.-]+matches any combination of word characters which could potentially lead to inefficient matching, especially on large input strings.The proposed fix limits the characters to letters (both upper and lowercase), digits, dots, and hyphens which are typically valid characters for domain extensions.
Also, minimum of 2 characters has been set to ensure a valid domain extension, such as ".com" or ".co.in" or ".org" etc.