eslint-plugin-security

ESLint rules for Node Security

This project will help identify potential security hotspots, but finds a lot of false positives which need triage by a human.

Installation

npm install --save-dev eslint-plugin-security

or

yarn add --dev eslint-plugin-security

Usage

Flat config (requires eslint >= v8.23.0)

Add the following to your eslint.config.js file:

const pluginSecurity = require('eslint-plugin-security');

module.exports = [pluginSecurity.configs.recommended];

eslintrc config (deprecated)

Add the following to your .eslintrc file:

module.exports = {
  extends: ['plugin:security/recommended-legacy'],
};

Developer guide

• Use GitHub pull requests.
• Conventions:
• We use our custom ESLint setup.
• Please implement a test for each new rule and use this command to be sure the new code respects the style guide and the tests keep passing:

npm run-script cont-int

Tests

npm test

Rules

⚠️ Configurations set to warn in.
✅ Set in the recommended configuration.

Name	Description	⚠️
detect-bidi-characters	Detects trojan source attacks that employ unicode bidi attacks to inject malicious code.	✅
detect-buffer-noassert	Detects calls to “buffer” with “noAssert” flag set.	✅
detect-child-process	Detects instances of “child_process” & non-literal “exec()” calls.	✅
detect-disable-mustache-escape	Detects “object.escapeMarkup = false”, which can be used with some template engines to disable escaping of HTML entities.	✅
detect-eval-with-expression	Detects “eval(variable)” which can allow an attacker to run arbitrary code inside your process.	✅
detect-new-buffer	Detects instances of new Buffer(argument) where argument is any non-literal value.	✅
detect-no-csrf-before-method-override	Detects Express “csrf” middleware setup before “method-override” middleware.	✅
detect-non-literal-fs-filename	Detects variable in filename argument of “fs” calls, which might allow an attacker to access anything on your system.	✅
detect-non-literal-regexp	Detects “RegExp(variable)”, which might allow an attacker to DOS your server with a long-running regular expression.	✅
detect-non-literal-require	Detects “require(variable)”, which might allow an attacker to load and run arbitrary code, or access arbitrary files on disk.	✅
detect-object-injection	Detects “variable[key]” as a left- or right-hand assignment operand.	✅
detect-possible-timing-attacks	Detects insecure comparisons (==, !=, !== and ===), which check input sequentially.	✅
detect-pseudoRandomBytes	Detects if “pseudoRandomBytes()” is in use, which might not give you the randomness you need and expect.	✅
detect-unsafe-regex	Detects potentially unsafe regular expressions, which may take a very long time to run, blocking the event loop.	✅

TypeScript support

Type definitions for this package are managed by DefinitelyTyped. Use @types/eslint-plugin-security for type checking.

npm install --save-dev @types/eslint-plugin-security

# OR

yarn add --dev @types/eslint-plugin-security