Amazon SSM Agent - Release 3.3.4268.0 - 2026-04-21

• Add SSM Distributor support for Bottlerocket OS
• Implement flush credentials command in ssm-cli
• Log ec2messages access denied as debug instead of error to reduce log noise
• Make credential refresher refresh cache quickly in case of credential flush
• Make Greengrass component registration resilient with retry

Amazon SSM Agent - Release 3.3.4177.0 - 2026-04-06

• Add EnforceWorkspaceRootOwnership configuration to support disable hardening of agent workspace
• Add reboot comment to Windows shutdown command for SSM Agent traceability
• Update privilege access check to verify ownership and permissions of document state files

Amazon SSM Agent - Release 3.3.4121.0 - 2026-03-25

• Add read-only version check prior to install and uninstall in case of occupied package manager locks
• Add ANSI processing for CloudWatch and S3 log
• Upgrade go-git to v5.17.0 and cloudflare/circl to v1.6.3 to fix CVE-2026-1229

Amazon SSM Agent - Release 3.3.4108.0 - 2026-03-23

• Disable Go 1.25 container-aware GOMAXPROCS to prevent holding cgroup file descriptors open
• Upgrade Go version to 1.25.8

Amazon SSM Agent - Release 3.3.3883.0 - 2026-02-25

• Document CommandWorkerBufferLimit config
• Include package update in Dockerfile
• Reduce CloudWatch event message length threshold
• Upgrade Go version to 1.25.7
• Update github.com/go-git/go-git/v5 to 5.16.5
• Update greengrass version

Amazon SSM Agent - Release 3.3.3797.0 - 2026-02-10

• Update Golang version to 1.24.12
• Updating golang.org/x/crypto from v0.37.0 to v0.47.0, golang.org/x/net from v0.39.0 to v0.48.0 and golang.org/x/sys from v0.32.0 to v0.40.0
• Categorize integration tests by adding new tags to split fast and slow ones
• Fix bug where IP field being empty string and causing UII API failure

Amazon SSM Agent - Release 3.3.3598.0 - 2025-12-22

• Allow Patch execution to persist across reboots not registered to SSM Agent

Amazon SSM Agent - Release 3.3.3572.0 - 2025-12-10

• Fix ENV_VAR interpolation to work correctly with parameter store value
• Implement immediate retries for failed reply messages to MGS for RunCommand documents
• Improve ssm-cli get-diagnostics command log output
• Support DomainJoin endpoint for EU sovereign cloud
• Support dualstack S3 endpoint for distributor packages
• Upgrade Go version to 1.24.11

Amazon SSM Agent - Release 3.3.3270.0 - 2025-10-09

• Add initial IPv6 support with UseDualStackEndpoint configuration option
• Fix CPU utilization issue for instances with thousands of network interfaces

Amazon SSM Agent - Release 3.3.3185.0 - 2025-09-30

• Add IMDS retry count to account for EC2 droplet refresh
• Fix duplicate uid error logging in MDS module
• Update aws:Domainjoin plugin logging from Log4Net to NLog
• Upgrade Go version to 1.24.7
• Update github.com/go-git/go-git/v5 to 5.15.0
• Update golang.org/x/crypto to v0.37.0
• Update golang.org/x/net to v0.39.0
• Update golang.org/x/sys to v0.32.0