🚀 New AWS Lambda Feature: Cross-Account DynamoDB Streams Access

Amazon Web Services (AWS) just announced a useful update for event-driven architectures.

As of Jan 15, 2026, AWS Lambda now supports cross-account access for DynamoDB Streams. This allows you to trigger a Lambda function in one AWS account from a DynamoDB Stream in another account.

Why this matters

Many teams utilize multi-account architectures to isolate workloads, centralize processing, or facilitate collaboration across teams. Until now, sharing DynamoDB events across accounts often required custom replication or streaming solutions, adding unnecessary complexity and operational overhead.

With this update

• Configure resource-based policies directly on DynamoDB Streams
• Trigger Lambda functions in a different AWS account
• Remove the need for custom replication pipelines

This simplifies centralized event processing, cross-team integrations, and overall architecture design.

Docs

Great step forward for building scalable, event-driven systems on AWS.