diff --git a/change/@azure-msal-browser-bc911259-ba35-43da-8c09-76cc3916692c.json b/change/@azure-msal-browser-bc911259-ba35-43da-8c09-76cc3916692c.json
new file mode 100644
index 0000000000..a4e31eddca
--- /dev/null
+++ b/change/@azure-msal-browser-bc911259-ba35-43da-8c09-76cc3916692c.json
@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "Add allow=\"local-network-access *\" attribute to iframe for Chrome 142 compatibility",
+  "packageName": "@azure/msal-browser",
+  "email": "198982749+Copilot@users.noreply.github.com",
+  "dependentChangeType": "patch"
+}
diff --git a/lib/msal-browser/src/interaction_handler/SilentHandler.ts b/lib/msal-browser/src/interaction_handler/SilentHandler.ts
index e896e65b22..82917963e5 100644
--- a/lib/msal-browser/src/interaction_handler/SilentHandler.ts
+++ b/lib/msal-browser/src/interaction_handler/SilentHandler.ts
@@ -256,6 +256,7 @@ function createHiddenIframe(): HTMLIFrameElement {
         "sandbox",
         "allow-scripts allow-same-origin allow-forms"
     );
+    authFrame.setAttribute("allow", "local-network-access *");
     document.body.appendChild(authFrame);
 
     return authFrame;
diff --git a/lib/msal-browser/test/interaction_handler/SilentHandler.spec.ts b/lib/msal-browser/test/interaction_handler/SilentHandler.spec.ts
index 6629120c5b..ff0d458d85 100644
--- a/lib/msal-browser/test/interaction_handler/SilentHandler.spec.ts
+++ b/lib/msal-browser/test/interaction_handler/SilentHandler.spec.ts
@@ -98,6 +98,19 @@ describe("SilentHandler.ts Unit Tests", () => {
             expect(endTime - startTime).toBeLessThan(DEFAULT_IFRAME_TIMEOUT_MS);
             expect(authFrame instanceof HTMLIFrameElement).toBe(true);
         });
+
+        it("Sets the allow attribute for local network access on iframe", async () => {
+            const authFrame = await SilentHandler.initiateCodeRequest(
+                testNavUrl,
+                performanceClient,
+                browserRequestLogger,
+                RANDOM_TEST_GUID,
+                0
+            );
+            expect(authFrame.getAttribute("allow")).toBe(
+                "local-network-access *"
+            );
+        });
     });
 
     describe("monitorIframeForHash", () => {