Detects non-literal values in regular expressions

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Metadata

ID: javascript-node-security/detect-non-literal-regexp

Language: JavaScript

Severity: Warning

Category: Security

Description

Creating a regular expression with user input can lead to a Regular Expression Denial of Service (ReDoS) attack. In this type of attack, a user can submit a very complex regular expression that takes too long to execute.

If you have an advanced use case that requires regex evaluation with user input, always make sure to sanitize the data and provide a safe timeout environment.

Non-Compliant Code Examples

var a = new RegExp(c, 'i');

Compliant Code Examples

var a = new RegExp('ab+c', 'i');