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AWS AWSCloudFormation documentation change

Service: AWSCloudFormation · 2026-04-10 · Documentation low

File: AWSCloudFormation/latest/TemplateReference/aws-properties-dlm-lifecyclepolicy-crossregioncopyrule.md

Summary

Updated KMS key ARN pattern regex from {1,3} to {1,4} for region code length

Security assessment

This change expands the regex pattern for KMS key ARNs to support longer region codes (up to 4 characters instead of 3). This appears to be a routine update to support new AWS regions or partitions, not a security fix. No evidence of security vulnerability being addressed.

Diff

diff --git a/AWSCloudFormation/latest/TemplateReference/aws-properties-dlm-lifecyclepolicy-crossregioncopyrule.md b/AWSCloudFormation/latest/TemplateReference/aws-properties-dlm-lifecyclepolicy-crossregioncopyrule.md
index 3119faad7..24b50967b 100644
--- a//AWSCloudFormation/latest/TemplateReference/aws-properties-dlm-lifecyclepolicy-crossregioncopyrule.md
+++ b//AWSCloudFormation/latest/TemplateReference/aws-properties-dlm-lifecyclepolicy-crossregioncopyrule.md
@@ -58 +58 @@ _Required_ : No
- _Pattern_ : `arn:aws(-[a-z]{1,3}){0,2}:kms:([a-z]+-){2,3}\d:\d+:key/.*`
+ _Pattern_ : `arn:aws(-[a-z]{1,4}){0,2}:kms:([a-z]+-){2,3}\d:\d+:key/.*`