2.46.1 2026-06-02

AWS IoT

• Features

  • Fleet indexing documentation update

AWS Lambda

• Features

  • Adds configuration for tag propagation to Lambda-managed resources.

Amazon ElastiCache

• Features

  • Amazon ElastiCache for Valkey now supports durability. This new capability is enabled through a Multi-AZ transactional log, enabling fast recovery and restart during failures.

Amazon Elastic Compute Cloud

• Features

  • Amazon EC2 now supports self-service cancellation of future-dated Capacity Reservations. A cancellation charge applies based on remaining commitment. Customers can generate a cancellation quote to review charges before confirming.

Amazon GuardDuty

• Features

  • Amazon GuardDuty Runtime Monitoring now supports 3 new SensitiveFileModified finding types (Persistence, PrivilegeEscalation, DefenseEvasion) that detect when security-sensitive system files are modified on EC2 instances or containers, indicating potential compromise through file tampering.

Amazon Keyspaces Streams

• Features

  • Added iterator description to the GetRecords API response for Amazon Keyspaces Change Data Capture (CDC) streams, enabling consumers to track their current position within the stream.

Amazon Location Service Routes V2

• Features

  • Added Transit and Intermodal travel modes to CalculateRoutes. Plan routes using public transit (bus, subway, train, ferry) or combine transit with driving, taxi, and rental car segments in a single multi-modal route.

Amazon SageMaker Service

• Features

  • Amazon SageMaker Job is a new service to help you manage various workloads related to model fine tuning, evaluation etc. Two job categories are supported today, AgentRFT for multi-turn agentic reinforcement fine tuning, and AgentRFTEvaluation for evaluating base model or trained model from AgentRFT.

Amazon Transcribe Service

• Features

  • Release new Language locales including am-ET, es-MX, fa-AF, ht-HT, jv-ID, km-KH, my-MM, sq-AL, ne-NP. The commit shows past locales that have already been release which include cy-gb, ga-ie, gd-gb.

S3 Transfer Manager

• Bugfixes

  • Fix a resource leak in downloadDirectory where cancelling the download could still allow file transfers that arrive late to recreate the destination directory. Added a guard in DownloadDirectoryHelper to skip file downloads after the operation is cancelled.

Sagemaker Job Runtime Service

• Features

  • Amazon SageMaker Job Runtime is a new service for managing trajectory data during multi-turn customization jobs. It provides APIs to send inference requests to models during job execution, mark rollouts as complete, and submit reward values for training trajectories.