Announcing the LocalStack for AWS 2026.08.0 Release

LocalStack for AWS 2026.08.0 introduces emulation for Lambda Durable Functions, including checkpointing, retries, callbacks, execution management, and multiple runtimes, though it requires a paid plan and omits some AWS monitoring, encryption, quota, and rate-limit behavior. The release also adds CloudFront KeyValueStore support for viewer-request CloudFront Functions, makes the native ELBv2 provider the default with automatic state migration and closer AWS-compatible validation and responses, and expands Verified Permissions with OIDC token authorization, policy-store aliases, enhanced Cedar support, pagination, and CloudFormation updates. RDS gains Aurora and Data API capabilities, refreshed engine metadata, parameter-group operations, and cluster improvements, while OpenSearch 3.7 becomes the default for new domains and supports upgrades and richer domain configuration updates. CloudFormation now supports in-place updates for numerous resources across API Gateway, analytics, identity, security, networking, scheduling, and other AWS services, alongside compatibility fixes for CDK and Amplify workflows. Additional changes restore the Docker image base to Debian trixie, add service-specific Docker flags, resolve runtime and memory issues, and improve fidelity across S3, IAM, STS, EventBridge, MSK, AppSync, SNS, CloudWatch Logs, and other providers. The release also announces removal of unsupported LocalStack 0.12.x and several legacy images on September 25, 2026, removes the EC2 Libvirt VM manager, deprecates older AMIs and Amazon Pinpoint, and plans to retire the legacy ELBv2 provider.

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