diff --git a/dstack/kms/auth-eth/test/DstackApp.t.sol b/dstack/kms/auth-eth/test/DstackApp.t.sol
index 646bd827e..9f590d2e3 100644
--- a/dstack/kms/auth-eth/test/DstackApp.t.sol
+++ b/dstack/kms/auth-eth/test/DstackApp.t.sol
@@ -265,9 +265,11 @@ contract DstackAppTest is Test {
         vm.startPrank(owner);
         app.addDevice(deviceId);
         app.addComposeHash(composeHash);
-        app.setRequireTcbUpToDate(true);
         vm.stopPrank();
 
+        string[] memory advisoryIds = new string[](1);
+        advisoryIds[0] = "INTEL-SA-00614";
+
         IAppAuth.AppBootInfo memory bootInfo = IAppAuth.AppBootInfo({
             appId: address(app),
             composeHash: composeHash,
@@ -277,10 +279,17 @@ contract DstackAppTest is Test {
             mrSystem: bytes32(0),
             osImageHash: bytes32(0),
             tcbStatus: "OutOfDate",
-            advisoryIds: new string[](0)
+            advisoryIds: advisoryIds
         });
 
+        // Legacy 5-arg init skips the TCB check (specification.md §3.4). This deliberately
+        // diverges from auth-simple's strict default; see auth-simple/index.test.ts.
         (bool allowed, string memory reason) = app.isAppAllowed(bootInfo);
+        assertTrue(allowed);
+
+        vm.prank(owner);
+        app.setRequireTcbUpToDate(true);
+        (allowed, reason) = app.isAppAllowed(bootInfo);
         assertFalse(allowed);
         assertEq(reason, "TCB status is not up to date");
 
diff --git a/dstack/kms/auth-simple/index.test.ts b/dstack/kms/auth-simple/index.test.ts
index 32ad06772..9794091e1 100644
--- a/dstack/kms/auth-simple/index.test.ts
+++ b/dstack/kms/auth-simple/index.test.ts
@@ -374,6 +374,30 @@ describe('auth-simple', () => {
 
       expect(json.isAllowed).toBe(true);
     });
+
+    // Stricter than a legacy DstackApp by design; see DstackApp.t.sol
+    // test_IsAppAllowed_RejectsOutdatedTcbWhenRequired.
+    it('rejects app boot with out-of-date TCB or unallowlisted advisory ID', async () => {
+      writeTestConfig({
+        gatewayAppId: '0xgateway',
+        osImages: [baseBootInfo.osImageHash],
+        apps: { '0xapp123': { composeHashes: ['0xcompose456'], allowAnyDevice: true } }
+      });
+
+      for (const [patch, reason] of [
+        [{ tcbStatus: 'OutOfDate' }, 'TCB status is not allowed'],
+        [{ advisoryIds: ['INTEL-SA-00614'] }, 'advisory ID is not allowed'],
+      ] as const) {
+        const res = await app.fetch(new Request('http://localhost/bootAuth/app', {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({ ...baseBootInfo, ...patch })
+        }));
+        const json = await res.json();
+        expect(json.isAllowed).toBe(false);
+        expect(json.reason).toBe(reason);
+      }
+    });
   });
 
   describe('hex normalization', () => {