●Change8

Migrating to Terraform v1.15.0-rc1

Version v1.15.0-rc1 introduces 1 breaking change. This guide details how to update your code.

Released: 4/9/2026

1
Breaking Changes
1
Migration Steps
19
Affected Symbols

⚠️ Check Your Code

If you use any of these symbols, you need to read this guide:

backend/s3validate commandconvert functionmodule source attributemodule version attributeoutput blocksssh-based provisioner (file + remote-exec)terraform init loginit commandterraform test mock blocksresource deprecation logiclist_start JSON logsinput variable validation for Stackscontainer value comparison to nullterraform applyreplace_triggered_bybackend/httpstate show commandterraform cloud discovery requests

Breaking Changes

●Issue #1

The `AWS_USE_FIPS_ENDPOINT` and `AWS_USE_DUALSTACK_ENDPOINT` environment variables for the S3 backend now only respect explicit "true" or "false" string values. Previously, any non-empty value was treated as true. Users relying on non-boolean truthy values must update their environment variable settings to use "true" explicitly.

Migration Steps

  1. 1
    If using `AWS_USE_FIPS_ENDPOINT` or `AWS_USE_DUALSTACK_ENDPOINT` environment variables for the S3 backend, ensure their values are explicitly set to "true" or "false" if they were previously set to any non-empty string.

Release Summary

This release introduces Windows ARM64 builds, support for deprecation attributes on variables/outputs, and the new `convert` function. It also enhances configuration validation and fixes several bugs related to CLI output, state handling, and backend operations.

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View the full release notes and all changes for Terraform v1.15.0-rc1.

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