# OpenTofu v1.12.1 — Release & Upgrade Intelligence
- **Product:** OpenTofu (https://opentofu.org)
- **Version:** v1.12.1
- **Released:** May 27, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/opentofu/updates/v1.12.1/

## Executive Summary (TL;DR)
OpenTofu v1.12.1. Source highlight: SECURITY ADVISORIES:

## Bug Fixes
- Address a bug introduced in v1.12.0 causing excessive memory usage by providers. (#4126)
- Address a bug introduced in v1.12.0 where `replace_triggered_by` was validated incorrectly. (#4133
- The Azure key provider will now accept the `tenant_id`, `subscription_id`, `environment`, and `metadata_host` variables; a bug previously only allowed these to be set through environment variables. (#4091)