PCI-DSS Requirement Reference Regex for JavaScript

What this pattern does

This page provides a comprehensive, battle-tested regular expression for matching pci-dss requirement reference, ported and verified for JavaScript. In security-sensitive code, using an unverified regex can open the door to both false positives and denial-of-service attacks. The snippet below is ready to drop into your JavaScript project — whether you're validating in an Express middleware, a Next.js API route, or a client-side form.

Javascript Implementation

// PCI-DSS Requirement Reference
// ReDoS-safe | RegexVault — Security > Audit & Compliance

const pcidssRequirementReferenceRegex = /^Req(?:uirement)?\s*([1-9]|1[0-2])(?:\.([1-9]|[1-9][0-9])(?:\.([1-9]|[1-9][0-9]))?)?$/i;

function validatePcidssRequirementReference(input: string): boolean {
  return pcidssRequirementReferenceRegex.test(input);
}

// Example
console.log(validatePcidssRequirementReference("Requirement 3")); // true

Test Cases

When to use this pattern

This pattern is drawn from the Security > Audit & Compliance category and carries a ReDoS-safe certification. That matters for JavaScript developers because especially critical in long-running Node.js event loops where a ReDoS vulnerability can block the entire process. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

PCI-DSS v4.0 (released March 2022, mandatory from March 2025) has 12 requirements. Key requirements: 3 (Protect stored cardholder data), 4 (Encrypt transmission), 6 (Develop/maintain secure systems), 10 (Log and monitor), 12 (Information security policy). v4.0 adds 64 new requirements vs v3.2.1.