diff --git a/src/resources/expected/validation_reports6.json b/src/resources/expected/validation_reports6.json
index 6bf9cbbc..aeb29d9a 100644
--- a/src/resources/expected/validation_reports6.json
+++ b/src/resources/expected/validation_reports6.json
@@ -828,6 +828,85 @@
       }
     ]
   },
+  "good/functions/split_get_stack_output.yaml": {
+    "filePath": "good/functions/split_get_stack_output.yaml",
+    "status": "OK",
+    "metadata": {
+      "resourcesScanned": 3,
+      "counts": {
+        "fatal": 0,
+        "errors": 0,
+        "warnings": 0,
+        "informational": 3,
+        "debug": 0
+      },
+      "suppressed": 0,
+      "strict": false,
+      "severityLevel": "DEBUG"
+    },
+    "diagnostics": [
+      {
+        "ruleId": "I9040",
+        "severity": "INFO",
+        "message": "Resource 'Bucket' of type 'AWS::S3::Bucket' supports Tags but none are configured",
+        "source": "ENGINE",
+        "entity": {
+          "logicalId": "Bucket",
+          "entityType": "Resource",
+          "resourceType": "AWS::S3::Bucket"
+        },
+        "propertyPath": "Properties.Tags",
+        "suggestedFix": "Add Tags to improve resource organization and cost tracking",
+        "category": "Best Practice",
+        "startLine": 6,
+        "startColumn": 5,
+        "endLine": 6,
+        "endColumn": 15,
+        "ruleDescription": "Resource should have Tags",
+        "phase": "LINT"
+      },
+      {
+        "ruleId": "I9040",
+        "severity": "INFO",
+        "message": "Resource 'AllHeaders' of type 'AWS::SSM::Parameter' supports Tags but none are configured",
+        "source": "ENGINE",
+        "entity": {
+          "logicalId": "AllHeaders",
+          "entityType": "Resource",
+          "resourceType": "AWS::SSM::Parameter"
+        },
+        "propertyPath": "Properties.Tags",
+        "suggestedFix": "Add Tags to improve resource organization and cost tracking",
+        "category": "Best Practice",
+        "startLine": 21,
+        "startColumn": 5,
+        "endLine": 21,
+        "endColumn": 15,
+        "ruleDescription": "Resource should have Tags",
+        "phase": "LINT"
+      },
+      {
+        "ruleId": "I9040",
+        "severity": "INFO",
+        "message": "Resource 'FirstHeader' of type 'AWS::SSM::Parameter' supports Tags but none are configured",
+        "source": "ENGINE",
+        "entity": {
+          "logicalId": "FirstHeader",
+          "entityType": "Resource",
+          "resourceType": "AWS::SSM::Parameter"
+        },
+        "propertyPath": "Properties.Tags",
+        "suggestedFix": "Add Tags to improve resource organization and cost tracking",
+        "category": "Best Practice",
+        "startLine": 34,
+        "startColumn": 5,
+        "endLine": 34,
+        "endColumn": 15,
+        "ruleDescription": "Resource should have Tags",
+        "phase": "LINT"
+      }
+    ]
+  },
   "good/functions/sub.yaml": {
     "filePath": "good/functions/sub.yaml",
     "status": "OK",
@@ -16333,44 +16412,5 @@
         "phase": "LINT"
       }
     ]
-  },
-  "good/sam/function_dlq_valid.yaml": {
-    "filePath": "good/sam/function_dlq_valid.yaml",
-    "status": "OK",
-    "metadata": {
-      "resourcesScanned": 1,
-      "counts": {
-        "fatal": 0,
-        "errors": 0,
-        "warnings": 0,
-        "informational": 1,
-        "debug": 0
-      },
-      "suppressed": 0,
-      "strict": false,
-      "severityLevel": "DEBUG"
-    },
-    "diagnostics": [
-      {
-        "ruleId": "I9040",
-        "severity": "INFO",
-        "message": "Resource 'Fn' of type 'AWS::Serverless::Function' supports Tags but none are configured",
-        "source": "ENGINE",
-        "entity": {
-          "logicalId": "Fn",
-          "entityType": "Resource",
-          "resourceType": "AWS::Serverless::Function"
-        },
-        "propertyPath": "Properties.Tags",
-        "suggestedFix": "Add Tags to improve resource organization and cost tracking",
-        "category": "Best Practice",
-        "startLine": 5,
-        "startColumn": 5,
-        "endLine": 5,
-        "endColumn": 15,
-        "ruleDescription": "Resource should have Tags",
-        "phase": "LINT"
-      }
-    ]
   }
 }
diff --git a/src/resources/expected/validation_reports7.json b/src/resources/expected/validation_reports7.json
index e01a396e..f6b6f24f 100644
--- a/src/resources/expected/validation_reports7.json
+++ b/src/resources/expected/validation_reports7.json
@@ -1,4 +1,43 @@
 {
+  "good/sam/function_dlq_valid.yaml": {
+    "filePath": "good/sam/function_dlq_valid.yaml",
+    "status": "OK",
+    "metadata": {
+      "resourcesScanned": 1,
+      "counts": {
+        "fatal": 0,
+        "errors": 0,
+        "warnings": 0,
+        "informational": 1,
+        "debug": 0
+      },
+      "suppressed": 0,
+      "strict": false,
+      "severityLevel": "DEBUG"
+    },
+    "diagnostics": [
+      {
+        "ruleId": "I9040",
+        "severity": "INFO",
+        "message": "Resource 'Fn' of type 'AWS::Serverless::Function' supports Tags but none are configured",
+        "source": "ENGINE",
+        "entity": {
+          "logicalId": "Fn",
+          "entityType": "Resource",
+          "resourceType": "AWS::Serverless::Function"
+        },
+        "propertyPath": "Properties.Tags",
+        "suggestedFix": "Add Tags to improve resource organization and cost tracking",
+        "category": "Best Practice",
+        "startLine": 5,
+        "startColumn": 5,
+        "endLine": 5,
+        "endColumn": 15,
+        "ruleDescription": "Resource should have Tags",
+        "phase": "LINT"
+      }
+    ]
+  },
   "good/sam/function_image_valid.yaml": {
     "filePath": "good/sam/function_image_valid.yaml",
     "status": "OK",
@@ -39176,136 +39215,5 @@
         "phase": "LINT"
       }
     ]
-  },
-  "quickstart/openshift_master.yaml": {
-    "filePath": "quickstart/openshift_master.yaml",
-    "status": "OK",
-    "metadata": {
-      "resourcesScanned": 2,
-      "counts": {
-        "fatal": 0,
-        "errors": 0,
-        "warnings": 0,
-        "informational": 6,
-        "debug": 0
-      },
-      "suppressed": 0,
-      "strict": false,
-      "severityLevel": "DEBUG"
-    },
-    "diagnostics": [
-      {
-        "ruleId": "I3011",
-        "severity": "INFO",
-        "message": "'DeletionPolicy' is a required property (The default action when replacing/removing a resource is to delete it. Set explicit values for stateful resource)",
-        "source": "CFN_LINT",
-        "entity": {
-          "logicalId": "OpenShiftStack",
-          "entityType": "Resource",
-          "resourceType": "AWS::CloudFormation::Stack"
-        },
-        "category": "Best Practice",
-        "startLine": 184,
-        "startColumn": 3,
-        "endLine": 184,
-        "endColumn": 17,
-        "ruleDescription": "Check stateful resources have a set UpdateReplacePolicy/DeletionPolicy",
-        "phase": "LINT"
-      },
-      {
-        "ruleId": "I3011",
-        "severity": "INFO",
-        "message": "'UpdateReplacePolicy' is a required property (The default action when replacing/removing a resource is to delete it. Set explicit values for stateful resource)",
-        "source": "CFN_LINT",
-        "entity": {
-          "logicalId": "OpenShiftStack",
-          "entityType": "Resource",
-          "resourceType": "AWS::CloudFormation::Stack"
-        },
-        "category": "Best Practice",
-        "startLine": 184,
-        "startColumn": 3,
-        "endLine": 184,
-        "endColumn": 17,
-        "ruleDescription": "Check stateful resources have a set UpdateReplacePolicy/DeletionPolicy",
-        "phase": "LINT"
-      },
-      {
-        "ruleId": "I3011",
-        "severity": "INFO",
-        "message": "'DeletionPolicy' is a required property (The default action when replacing/removing a resource is to delete it. Set explicit values for stateful resource)",
-        "source": "CFN_LINT",
-        "entity": {
-          "logicalId": "VPCStack",
-          "entityType": "Resource",
-          "resourceType": "AWS::CloudFormation::Stack"
-        },
-        "category": "Best Practice",
-        "startLine": 242,
-        "startColumn": 3,
-        "endLine": 242,
-        "endColumn": 11,
-        "ruleDescription": "Check stateful resources have a set UpdateReplacePolicy/DeletionPolicy",
-        "phase": "LINT"
-      },
-      {
-        "ruleId": "I3011",
-        "severity": "INFO",
-        "message": "'UpdateReplacePolicy' is a required property (The default action when replacing/removing a resource is to delete it. Set explicit values for stateful resource)",
-        "source": "CFN_LINT",
-        "entity": {
-          "logicalId": "VPCStack",
-          "entityType": "Resource",
-          "resourceType": "AWS::CloudFormation::Stack"
-        },
-        "category": "Best Practice",
-        "startLine": 242,
-        "startColumn": 3,
-        "endLine": 242,
-        "endColumn": 11,
-        "ruleDescription": "Check stateful resources have a set UpdateReplacePolicy/DeletionPolicy",
-        "phase": "LINT"
-      },
-      {
-        "ruleId": "I9040",
-        "severity": "INFO",
-        "message": "Resource 'OpenShiftStack' of type 'AWS::CloudFormation::Stack' supports Tags but none are configured",
-        "source": "ENGINE",
-        "entity": {
-          "logicalId": "OpenShiftStack",
-          "entityType": "Resource",
-          "resourceType": "AWS::CloudFormation::Stack"
-        },
-        "propertyPath": "Properties.Tags",
-        "suggestedFix": "Add Tags to improve resource organization and cost tracking",
-        "category": "Best Practice",
-        "startLine": 185,
-        "startColumn": 5,
-        "endLine": 185,
-        "endColumn": 15,
-        "ruleDescription": "Resource should have Tags",
-        "phase": "LINT"
-      },
-      {
-        "ruleId": "I9040",
-        "severity": "INFO",
-        "message": "Resource 'VPCStack' of type 'AWS::CloudFormation::Stack' supports Tags but none are configured",
-        "source": "ENGINE",
-        "entity": {
-          "logicalId": "VPCStack",
-          "entityType": "Resource",
-          "resourceType": "AWS::CloudFormation::Stack"
-        },
-        "propertyPath": "Properties.Tags",
-        "suggestedFix": "Add Tags to improve resource organization and cost tracking",
-        "category": "Best Practice",
-        "startLine": 243,
-        "startColumn": 5,
-        "endLine": 243,
-        "endColumn": 15,
-        "ruleDescription": "Resource should have Tags",
-        "phase": "LINT"
-      }
-    ]
   }
 }
diff --git a/src/resources/expected/validation_reports8.json b/src/resources/expected/validation_reports8.json
index b3b9936e..ab54b9b5 100644
--- a/src/resources/expected/validation_reports8.json
+++ b/src/resources/expected/validation_reports8.json
@@ -1,4 +1,135 @@
 {
+  "quickstart/openshift_master.yaml": {
+    "filePath": "quickstart/openshift_master.yaml",
+    "status": "OK",
+    "metadata": {
+      "resourcesScanned": 2,
+      "counts": {
+        "fatal": 0,
+        "errors": 0,
+        "warnings": 0,
+        "informational": 6,
+        "debug": 0
+      },
+      "suppressed": 0,
+      "strict": false,
+      "severityLevel": "DEBUG"
+    },
+    "diagnostics": [
+      {
+        "ruleId": "I3011",
+        "severity": "INFO",
+        "message": "'DeletionPolicy' is a required property (The default action when replacing/removing a resource is to delete it. Set explicit values for stateful resource)",
+        "source": "CFN_LINT",
+        "entity": {
+          "logicalId": "OpenShiftStack",
+          "entityType": "Resource",
+          "resourceType": "AWS::CloudFormation::Stack"
+        },
+        "category": "Best Practice",
+        "startLine": 184,
+        "startColumn": 3,
+        "endLine": 184,
+        "endColumn": 17,
+        "ruleDescription": "Check stateful resources have a set UpdateReplacePolicy/DeletionPolicy",
+        "phase": "LINT"
+      },
+      {
+        "ruleId": "I3011",
+        "severity": "INFO",
+        "message": "'UpdateReplacePolicy' is a required property (The default action when replacing/removing a resource is to delete it. Set explicit values for stateful resource)",
+        "source": "CFN_LINT",
+        "entity": {
+          "logicalId": "OpenShiftStack",
+          "entityType": "Resource",
+          "resourceType": "AWS::CloudFormation::Stack"
+        },
+        "category": "Best Practice",
+        "startLine": 184,
+        "startColumn": 3,
+        "endLine": 184,
+        "endColumn": 17,
+        "ruleDescription": "Check stateful resources have a set UpdateReplacePolicy/DeletionPolicy",
+        "phase": "LINT"
+      },
+      {
+        "ruleId": "I3011",
+        "severity": "INFO",
+        "message": "'DeletionPolicy' is a required property (The default action when replacing/removing a resource is to delete it. Set explicit values for stateful resource)",
+        "source": "CFN_LINT",
+        "entity": {
+          "logicalId": "VPCStack",
+          "entityType": "Resource",
+          "resourceType": "AWS::CloudFormation::Stack"
+        },
+        "category": "Best Practice",
+        "startLine": 242,
+        "startColumn": 3,
+        "endLine": 242,
+        "endColumn": 11,
+        "ruleDescription": "Check stateful resources have a set UpdateReplacePolicy/DeletionPolicy",
+        "phase": "LINT"
+      },
+      {
+        "ruleId": "I3011",
+        "severity": "INFO",
+        "message": "'UpdateReplacePolicy' is a required property (The default action when replacing/removing a resource is to delete it. Set explicit values for stateful resource)",
+        "source": "CFN_LINT",
+        "entity": {
+          "logicalId": "VPCStack",
+          "entityType": "Resource",
+          "resourceType": "AWS::CloudFormation::Stack"
+        },
+        "category": "Best Practice",
+        "startLine": 242,
+        "startColumn": 3,
+        "endLine": 242,
+        "endColumn": 11,
+        "ruleDescription": "Check stateful resources have a set UpdateReplacePolicy/DeletionPolicy",
+        "phase": "LINT"
+      },
+      {
+        "ruleId": "I9040",
+        "severity": "INFO",
+        "message": "Resource 'OpenShiftStack' of type 'AWS::CloudFormation::Stack' supports Tags but none are configured",
+        "source": "ENGINE",
+        "entity": {
+          "logicalId": "OpenShiftStack",
+          "entityType": "Resource",
+          "resourceType": "AWS::CloudFormation::Stack"
+        },
+        "propertyPath": "Properties.Tags",
+        "suggestedFix": "Add Tags to improve resource organization and cost tracking",
+        "category": "Best Practice",
+        "startLine": 185,
+        "startColumn": 5,
+        "endLine": 185,
+        "endColumn": 15,
+        "ruleDescription": "Resource should have Tags",
+        "phase": "LINT"
+      },
+      {
+        "ruleId": "I9040",
+        "severity": "INFO",
+        "message": "Resource 'VPCStack' of type 'AWS::CloudFormation::Stack' supports Tags but none are configured",
+        "source": "ENGINE",
+        "entity": {
+          "logicalId": "VPCStack",
+          "entityType": "Resource",
+          "resourceType": "AWS::CloudFormation::Stack"
+        },
+        "propertyPath": "Properties.Tags",
+        "suggestedFix": "Add Tags to improve resource organization and cost tracking",
+        "category": "Best Practice",
+        "startLine": 243,
+        "startColumn": 5,
+        "endLine": 243,
+        "endColumn": 15,
+        "ruleDescription": "Resource should have Tags",
+        "phase": "LINT"
+      }
+    ]
+  },
   "quickstart/test.yaml": {
     "filePath": "quickstart/test.yaml",
     "status": "OK",
diff --git a/src/resources/templates/good/functions/split_get_stack_output.yaml b/src/resources/templates/good/functions/split_get_stack_output.yaml
new file mode 100644
index 00000000..89590c49
--- /dev/null
+++ b/src/resources/templates/good/functions/split_get_stack_output.yaml
@@ -0,0 +1,43 @@
+AWSTemplateFormatVersion: "2010-09-09"
+Description: Fn::Split over Fn::GetStackOutput, the shape of a weak string-list cross-stack reference
+Resources:
+  Bucket:
+    Type: AWS::S3::Bucket
+    Properties:
+      CorsConfiguration:
+        CorsRules:
+          - AllowedMethods:
+              - GET
+            AllowedOrigins:
+              - "*"
+            ExposedHeaders:
+              Fn::Split:
+                - "||"
+                - Fn::GetStackOutput:
+                    StackName: producer-stack
+                    OutputName: ExportedHeaders
+  AllHeaders:
+    Type: AWS::SSM::Parameter
+    Properties:
+      Type: StringList
+      Value:
+        Fn::Join:
+          - ","
+          - Fn::Split:
+              - "||"
+              - Fn::GetStackOutput:
+                  StackName: producer-stack
+                  Region: us-east-1
+                  OutputName: ExportedHeaders
+  FirstHeader:
+    Type: AWS::SSM::Parameter
+    Properties:
+      Type: String
+      Value:
+        Fn::Select:
+          - 0
+          - Fn::Split:
+              - "||"
+              - Fn::GetStackOutput:
+                  StackName: producer-stack
+                  OutputName: ExportedHeaders
diff --git a/src/template-model/src/intrinsic_arg_shapes.rs b/src/template-model/src/intrinsic_arg_shapes.rs
index 20efd8e1..c1e292d9 100644
--- a/src/template-model/src/intrinsic_arg_shapes.rs
+++ b/src/template-model/src/intrinsic_arg_shapes.rs
@@ -17,8 +17,19 @@ const SELECT_SOURCE_FUNCTIONS: &[&str] = &[FN_FIND_IN_MAP, FN_GET_ATT, FN_GET_AZ
 const SELECT_INDEX_FUNCTIONS: &[&str] = &[FN_REF, FN_FIND_IN_MAP];
 const SELECT_INDEX_FUNCTIONS_EXT: &[&str] = &[FN_REF, FN_FIND_IN_MAP, FN_LENGTH];
 
-const SPLIT_SOURCE_FUNCTIONS: &[&str] =
-    &[FN_BASE64, FN_FIND_IN_MAP, FN_GET_ATT, FN_GET_AZS, FN_IF, FN_IMPORT_VALUE, FN_JOIN, FN_SELECT, FN_SUB, FN_REF];
+const SPLIT_SOURCE_FUNCTIONS: &[&str] = &[
+    FN_BASE64,
+    FN_FIND_IN_MAP,
+    FN_GET_ATT,
+    FN_GET_AZS,
+    FN_GET_STACK_OUTPUT,
+    FN_IF,
+    FN_IMPORT_VALUE,
+    FN_JOIN,
+    FN_SELECT,
+    FN_SUB,
+    FN_REF,
+];
 
 const SUB_VARIABLE_FUNCTIONS: &[&str] = &[
     FN_BASE64,
@@ -302,6 +313,21 @@ mod tests {
         assert!(validate_intrinsic_arg_shapes(&arena, &[]).is_empty());
     }
 
+    #[test]
+    fn split_source_get_stack_output_is_allowed() {
+        let mut arena = Arena::new();
+        let delimiter = alloc_string(&mut arena, "||");
+        let stack_name = alloc_string(&mut arena, "producer-stack");
+        let output_name = alloc_string(&mut arena, "ExportedList");
+        let source = alloc_intrinsic(
+            &mut arena,
+            IntrinsicFn::GetStackOutput(vec![("StackName".into(), stack_name), ("OutputName".into(), output_name)]),
+        );
+        alloc_intrinsic(&mut arena, IntrinsicFn::Split(delimiter, source));
+
+        assert!(validate_intrinsic_arg_shapes(&arena, &[]).is_empty());
+    }
+
     #[test]
     fn sub_variable_cidr_fires() {
         let mut arena = Arena::new();