diff --git a/app.js b/app.js
index a04aae71..7cebc6b4 100644
--- a/app.js
+++ b/app.js
@@ -430,6 +430,13 @@ function bindTableEvents(renderDraftValidation, updateEditorDraftFromEvent) {
     }
     event.preventDefault();
     renderDraftValidation.flush();
+
+    const saveButton = form.querySelector('button[type="submit"]');
+    if (saveButton && saveButton.getAttribute('aria-disabled') === 'true') {
+      showToast(saveButton.title || '현재 사용할 수 없는 작업입니다.');
+      return;
+    }
+
     saveEditor();
   });
 
@@ -790,6 +797,7 @@ function renderEditorRow(anchorId) {
   panel.className = 'editor-panel';
   const form = document.createElement('form');
   form.dataset.editorForm = 'true';
+  form.noValidate = true;
   const editorGrid = document.createElement('div');
   editorGrid.className = 'editor-grid';
 
@@ -1068,7 +1076,12 @@ function renderEditorValidation() {
 
   const saveButton = form.querySelector('button[type="submit"]');
   if (saveButton) {
-    saveButton.disabled = errors.length > 0;
+    saveButton.disabled = false;
+    if (errors.length > 0) {
+      saveButton.setAttribute('aria-disabled', 'true');
+    } else {
+      saveButton.removeAttribute('aria-disabled');
+    }
     saveButton.title = errors.length > 0 ? '입력값을 올바르게 수정해야 저장할 수 있습니다.' : '저장 (Enter)';
   }
 
diff --git a/tests/e2e/editor-validation-feedback.spec.js b/tests/e2e/editor-validation-feedback.spec.js
new file mode 100644
index 00000000..f6007f65
--- /dev/null
+++ b/tests/e2e/editor-validation-feedback.spec.js
@@ -0,0 +1,36 @@
+import { test, expect } from '@playwright/test';
+
+test.describe('editor validation feedback', () => {
+  test.beforeEach(async ({ page }) => {
+    await page.goto('./');
+    await page.getByRole('button', { name: '최상위 작업 추가' }).click();
+  });
+
+  test('routes an invalid required-field submit through product validation feedback', async ({ page }) => {
+    const form = page.locator('form[data-editor-form="true"]');
+    const toast = page.locator('#toast');
+
+    await expect(form).toBeVisible();
+    await form.evaluate((editorForm) => editorForm.requestSubmit());
+
+    await expect(page.locator('#editor-errors')).toContainText('최상위 작업은 단계 값을 입력해야 합니다.');
+    await expect(toast).toHaveClass(/show/);
+    await expect(toast).toContainText('입력값을 올바르게 수정해야 저장할 수 있습니다.');
+    await expect(form).toBeVisible();
+  });
+
+  test('flushes pending validation before an immediate valid submit', async ({ page }) => {
+    const phaseInput = page.locator('[data-testid="editor-phase"]');
+
+    await phaseInput.evaluate((input) => {
+      input.value = '즉시 제출 단계';
+      input.dispatchEvent(new Event('input', { bubbles: true }));
+      input.form.requestSubmit();
+    });
+
+    await expect(page.locator('form[data-editor-form="true"]')).toHaveCount(0);
+    await expect(
+      page.locator('tbody tr[data-task-id]').filter({ hasText: '즉시 제출 단계' }),
+    ).toHaveCount(1);
+  });
+});