CoreUI PRO Angular Admin Template v5.6.21 - Security Update

Tuesday, March 24, 2026

#changelog #angular #admin #template #v5 #pro

CoreUI PRO Angular Admin Template v5.6.21 - Security Update

We are pleased to announce the release of CoreUI PRO Angular Admin Template v5.6.21. This critical security update brings full support for Angular 21.2.5, includes updated CoreUI PRO for Angular v5.6.21 components, and addresses multiple security vulnerabilities. This release ensures your enterprise Angular admin dashboard runs securely with the latest framework improvements and all exclusive PRO features.

Speed up your responsive apps and websites with fully-featured, ready-to-use open-source admin panel templates—free to use and built for efficiency.

How to Update

Download from your CoreUI PRO account or clone the latest version:

git clone https://github.com/coreui/coreui-pro-angular-admin-template.git
cd coreui-pro-angular-admin-template
git checkout 5.6.21
npm install
ng update @angular/[email protected] @angular/[email protected]

For existing projects, update dependencies to match package.json from v5.6.21.

What’s New

Angular 21.2.5 Support

This release brings full support for Angular 21.2.5, ensuring your enterprise admin template benefits from:

Latest Framework Features: All Angular 21.2.5 improvements and enhancements
Security Fixes: Critical security patches from the Angular team
Stability Updates: Framework-level bug fixes and improvements
Performance Optimizations: Enhanced runtime performance
TypeScript Compatibility: Updated TypeScript support
Developer Experience: Improved error messages and tooling

CoreUI PRO for Angular v5.6.21

Updated to the latest CoreUI PRO for Angular components (v5.6.21):

All PRO Components: Latest exclusive enterprise components with security updates
Enhanced Performance: Improved component rendering
Security Updates: All components updated with latest security patches
Chart Integration: Updated Chart.js integration with fixes
Icon Library: Latest CoreUI Icons for Angular

Critical Security Patches

This release addresses important security vulnerabilities:

Flatted Library Vulnerability (GHSA-rf6f-7fwh-wjgh)

Patched a critical security issue in the flatted serialization library that could potentially be exploited in applications using flatted for data serialization.

Socket.io-parser Vulnerability (GHSA-677m-j7p3-52f9)

Resolved a security advisory in socket.io-parser that could affect applications using Socket.io for real-time communication features.

Undici Package - Multiple Security Issues

Updated undici to address critical security vulnerabilities:

WebSocket Parsing Vulnerabilities: Fixed parsing issues that could lead to security exploits
HTTP Smuggling Concerns: Addressed potential HTTP request smuggling attacks
Memory Consumption Weaknesses: Resolved memory exhaustion vulnerabilities
WebSocket Validation Gaps: Enhanced WebSocket connection validation
CRLF Injection Risks: Mitigated CRLF injection attack vectors

We strongly recommend updating immediately to protect your enterprise admin dashboard against these known vulnerabilities and ensure compliance with security best practices.

PRO-Exclusive Components

All exclusive enterprise components updated to v5.6.21:

Calendar - Advanced scheduling component with custom rendering
Date & Time Pickers - Professional date and time selection
Multi Select - Enhanced multi-selection with search
Smart Table - Enterprise data table with built-in features
Smart Pagination - Intelligent pagination controls
Loading Button - Interactive loading states
And more PRO components - Full suite of exclusive enterprise features

Development Tools Updates

Updated Angular CLI and build tools:

Angular CLI 21.2.3: Latest command-line interface with improvements
Angular Build Tools: Updated @angular/build for faster builds
Angular CDK 21.2.3: Latest component development kit
Better Developer Experience: Improved error messages and build performance

Dependency Updates

We have updated key dependencies to their latest versions, ensuring improved performance, security, and compatibility with Angular 21.2.5:

Angular Core Updates

@angular/animations to: 21.2.5
@angular/common to: 21.2.5
@angular/compiler to: 21.2.5
@angular/core to: 21.2.5
@angular/forms to: 21.2.5
@angular/language-service to: 21.2.5
@angular/localize to: 21.2.5
@angular/platform-browser to: 21.2.5
@angular/platform-browser-dynamic to: 21.2.5
@angular/router to: 21.2.5

Angular Development Tools

@angular/build to: 21.2.3
@angular/cli to: 21.2.3
@angular/compiler-cli to: 21.2.3
@angular/cdk to: 21.2.3

CoreUI PRO Packages

@coreui/angular-pro to: 5.6.21 - PRO components with security updates
@coreui/coreui-pro to: ~5.24.1 - PRO CSS framework
@coreui/icons-angular to: 5.6.21 - Icon library

Security Updates

Critical security patches applied to multiple dependencies
Enhanced protection against known vulnerabilities

These updates bring your enterprise admin template to the latest Angular 21.2.5 and related library versions with critical security improvements.

Getting Started

For new installations:

# Clone the repository
git clone https://github.com/coreui/coreui-pro-angular-admin-template.git
cd coreui-pro-angular-admin-template

# Install dependencies
npm install

# Start development server
ng serve

# Build for production
ng build --configuration production

The application will be available at http://localhost:4200

Template Features

This PRO admin template includes:

Enterprise Dashboard: Advanced admin dashboard with PRO widgets and charts
PRO Theme: Premium, professional design
Exclusive Components: All CoreUI PRO components included
Advanced Navigation: Multi-level sidebar with breadcrumbs
Chart.js Integration: Professional data visualization
Icons Library: Complete CoreUI Icons collection
PRO Forms: Advanced form components and validation
Smart Tables: Enterprise data tables with advanced features
Calendar & Pickers: Professional scheduling and date selection
Responsive Design: Mobile-first, fully responsive

Why Choose CoreUI PRO?

Enterprise Features: Exclusive PRO components not available in free version
Angular 21 Compatible: Latest Angular framework
Production Ready: Battle-tested in enterprise applications
Priority Support: Dedicated support team for PRO customers
Commercial License: Enterprise-ready licensing
Regular Updates: Frequent security updates and feature improvements
Active Community: Large community with priority support
Professional Design: Premium, modern interface
Well Documented: Complete Angular PRO documentation
TypeScript: Full TypeScript support with advanced types

Migration Notes

This is a security update with full backward compatibility. No breaking changes were introduced to PRO components or template structure. If you’re upgrading from an earlier version:

Download or clone the new version
Compare your customizations with new version
Update dependencies in your package.json
Run npm install to update packages
Test all PRO components thoroughly
Test your customizations
Run npm audit to verify security patches

Why Update?

Updating to v5.6.21 provides critical benefits:

Security: Multiple critical vulnerability patches
Latest Angular: Access to Angular 21.2.5 features and security fixes
Updated PRO Components: Latest exclusive components with improvements
Stability: Framework-level bug fixes
Best Practices: Stay current with security standards
Performance: Runtime optimizations and improvements
Compliance: Meet enterprise security compliance requirements
Support: Remain on officially supported versions

Security Recommendations

After updating:

Verify Patches: Run npm audit to confirm vulnerabilities are resolved
Test Thoroughly: Verify all dashboard and PRO component features
Update Regularly: Keep your dependencies up to date
Monitor Advisories: Subscribe to security advisories
Review Customizations: Ensure your custom code is compatible
Document Update: Record security updates for compliance
Test Real-time Features: Verify WebSocket and real-time functionality

Additional Resources

Priority Support

As a PRO customer, you have access to priority support:

Dedicated support team
Faster response times
Direct access to core developers
Priority bug fixes
Feature requests consideration

Visit CoreUI PRO Support for assistance.

For a comprehensive overview of all changes, enhancements, and updates introduced in this release, please refer to the full changelog on GitHub.