diff --git a/pkg/constants/constants.go b/pkg/constants/constants.go
index 8135895a1f9..7e3986e5eff 100644
--- a/pkg/constants/constants.go
+++ b/pkg/constants/constants.go
@@ -549,6 +549,7 @@ var AllowedExpressions = []string{
 	"github.event.pull_request.head.sha",
 	"github.event.pull_request.base.sha",
 	"github.actor",
+	"github.event_name",
 	"github.job",
 	"github.owner",
 	"github.repository",
diff --git a/pkg/workflow/expression_safety_test.go b/pkg/workflow/expression_safety_test.go
index 83f7ed18dc7..c3a836f82fc 100644
--- a/pkg/workflow/expression_safety_test.go
+++ b/pkg/workflow/expression_safety_test.go
@@ -100,6 +100,11 @@ func TestValidateExpressionSafety(t *testing.T) {
 			content:     "Default branch: ${{ github.event.repository.default_branch }}",
 			expectError: false,
 		},
+		{
+			name:        "allowed_github_event_name",
+			content:     "Event: ${{ github.event_name }}",
+			expectError: false,
+		},
 		{
 			name:        "multiple_allowed_expressions",
 			content:     "Workflow: ${{ github.workflow }}, Repository: ${{ github.repository }}, Output: ${{ steps.sanitized.outputs.text }}",