Winter ’27 Release Architect Highlights: Security, Agentic Architecture, and Governance
Focus on the Winter ’27 changes that require architectural attention and turn them into informed decisions across security, scale, agentic architecture, and governance.
The Winter '27 Release from Salesforce introduces significant updates to security, agentic architecture, and governance, requiring architects to make informed decisions to ensure secure and scalable systems.
What happened
Salesforce released the Winter '27 update, which includes security enhancements, new features for agentic architecture, and improved governance tools. The update requires architects to review and adapt their systems to new platform capabilities and mandatory security changes.
Why it matters
These updates are critical for maintaining secure and scalable Salesforce environments, especially as organizations adopt more complex integrations and agentic systems. Architects need to stay updated to leverage new capabilities and mitigate risks from deprecated features.
- Migrate legacy authentication methods to secure alternatives before deadlines.
- Adopt External Client Apps for better governance and security in integrations.
- Leverage increased platform limits and new features like Elastic Async Apex Jobs to improve scalability.
- Design agentic systems with Multi-Agent Orchestration and API Catalog for resilience.
- Evaluate new governance tools to enhance security oversight and compliance.
The bigger picture
The updates will require architects to revise existing systems, migrate to new authentication methods, and adopt new tools for governance and scalability. This can lead to more secure, efficient, and manageable Salesforce environments but may involve significant changes to current configurations.
The Winter '27 Release from Salesforce presents key updates that architects must address to ensure secure, scalable, and efficient systems. By focusing on security, agentic architecture, and governance, organizations can effectively leverage new capabilities while mitigating risks from deprecated features.
Technical details
- Legacy authentication methods (OAuth 2.0 device flow, username-password, user-agent, hybrid user-agent flows) are being retired.
- External Client Apps replace Connected Apps, offering a default-closed security posture and better governance.
- Apex heap limits increased to 10 MB (synchronous) and 25 MB (asynchronous).
- Elastic Async Apex Jobs (Beta) provide additional capacity for handling demand spikes.
- Multi-Agent Orchestration allows for composing specialist agents with streaming responses and handoff capabilities.
- API Catalog registers and activates MCP servers and APIs for agent tool access.
- Security Health Review and Security Mesh provide continuous security monitoring and unified data analysis.
FAQ
What are the main security changes in the Winter '27 Release?
The main security changes include the retirement of legacy authentication methods, introduction of refresh token inactivity expiration, and migration from Connected Apps to External Client Apps for better security and governance.
How do the new Apex heap limits impact application design?
The increased Apex heap limits (10 MB synchronous and 25 MB asynchronous) allow for more processing headroom, enabling developers to simplify code that previously needed workarounds to stay under older limits.
What is Multi-Agent Orchestration, and why is it important?
Multi-Agent Orchestration allows for composing specialist agents with streaming responses and handoff capabilities, enabling more resilient and scalable agentic systems. It is important for designing efficient agent interactions and reducing reliance on custom glue code.
What governance tools are introduced in the Winter '27 Release?
The Winter '27 Release introduces tools like Security Health Review, Security Mesh, and Scale Center, which provide continuous security monitoring, unified data analysis, and org-health alerts to enhance governance and oversight.
How should architects approach the migration from Connected Apps to External Client Apps?
Architects should migrate to External Client Apps by defining clear trust boundaries, managing credentials and policies, and standardizing decisions to improve governance and security in integrations.
This summary and analysis were generated with AI from the original article and may contain errors. Read the original for the full story.
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Originally published by Salesforce Einstein + Agentforce Blog on Oct 5, 2026.
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