Developer changelog updates for Jun 23, 2026

Summary

Introduces managed syslog ingestion for CloudWatch Logs, enabling firewalls, routers, switches, and Linux servers to send syslog over TCP, TLS, or UDP to a VPC endpoint without agents.

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Secret scanning now captures extended metadata for Replicate secrets

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Introduces preview AI‑powered investigations in GuardDuty to auto‑analyze findings and account activity

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Added export of logs in JSONL format

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Added public preview read‑only REST endpoints for fetching repository‑level Code Quality findings.

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Added support for EC2 G6e instances on SageMaker notebook instances, offering up to 8 NVIDIA L40 GPUs with 48 GB GPU memory each.

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Added support for Valkey 9.1 in Amazon ElastiCache node‑based clusters

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Introduced cross‑account access for Amazon Bedrock AgentCore Memory, allowing memory resources and agents to span multiple AWS accounts.

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Introduces 16 GiB of encrypted, automatically cleaned‑up ephemeral storage per workflow task, mountable at /tmp.

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Cognito user pools now support customer‑managed AWS KMS keys for at‑rest encryption

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Dependabot can now read private GitHub Packages registries without using a personal access token.

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Fixed unexpected behavior introduced by the prior security release (22.23.0).

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Introduces a GA tabbed terminal UI for GitHub Copilot CLI

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Updated Alpine‑based Docker images to 3.24.1.

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Introduces two new policy refinement workflows (iterative improvement and ambiguity reduction) for Automated Reasoning checks in Amazon Bedrock Guardrails.

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Docker images upgraded to Alpine 3.24.1

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Dependabot drops support for Python 3.9 now that it has reached end-of-life.

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Introduces CloudWatch OpenTelemetry Container Insights for Amazon EKS, collecting infrastructure metrics at 30‑second intervals via cAdvisor, Kube‑State‑Metrics, and NVIDIA DCGM.

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Updated Docker Alpine‑based images to version 3.24.1.

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Upgrade Alpine‑based Docker images to version 3.24.1.

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Updated Docker Alpine base images to version 3.24.1.

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Added BYOK support to the GitHub Copilot app, enabling use of your own keys.

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Introduces Claude Tag beta for Slack, allowing teams to tag @Claude in channels and delegate tasks

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Introduces AI‑assisted Migration Assistant to simplify moving self‑managed Solr, Elasticsearch, or OpenSearch deployments to OpenSearch Serverless or Managed Clusters

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Added support for Amazon EC2 G7e instances in SageMaker Studio notebooks, offering up to 8 RTX PRO 6000 GPUs, 96 GB GPU memory, and up to 192 vCPUs.