aws-cloudformation/cfn-lint v1.56.0

Release v1.56.0

on GitHub

What's Changed

• test(functions): assert FindInMap rejects non-DefaultValue 4th item without transform by @kddejong in #4639
• fix: Prevent path traversal in nested stack TemplateURL resolution by @kddejong in #4640
• fix: Require object for CreationPolicy and UpdatePolicy by @kddejong in #4641
• Fix E1010 resolve GetAtt to SAM generated resources by @kddejong in #4646
• chore(deps): bump pyinstaller from 6.21.0 to 6.22.1 in /requirements by @dependabot[bot] in #4647
• docs: add inspect.software health badge by @Nayjest in #4648
• Add AutoScalingInstanceRefresh to the UpdatePolicy schema by @ktrysmt in #4656
• chore(deps): bump pyinstaller from 6.22.1 to 6.22.2 in /requirements by @dependabot[bot] in #4650
• Update CloudFormation schemas to 2026-08-28 by @github-actions[bot] in #4637
• Fix E3016: Reject AutoScalingInstanceRefresh with AutoScalingRollingUpdate by @kddejong in #4661
• fix: Defer schema metadata updates until install succeeds by @Fail-Safe in #4662
• chore: Remove unused caching path from get_url_retrieve by @kddejong in #4663
• Allow GetAtt outputs on SAM applications by @0xTaoZ in #4665
• Update CloudFormation schemas to 2026-08-31 by @github-actions[bot] in #4664

New Contributors

• @Nayjest made their first contribution in #4648
• @ktrysmt made their first contribution in #4656
• @Fail-Safe made their first contribution in #4662

Full Changelog: v1.55.1...v1.56.0