diff --git a/src/coreclr/hosts/corerun/wasm/libCorerun.extpost.js b/src/coreclr/hosts/corerun/wasm/libCorerun.extpost.js
index cd20391385721a..80c0efdcb3e102 100644
--- a/src/coreclr/hosts/corerun/wasm/libCorerun.extpost.js
+++ b/src/coreclr/hosts/corerun/wasm/libCorerun.extpost.js
@@ -25,7 +25,7 @@ export function selfRun() {
         runtimeId: 0,
         runtimeBuildInfo: {
             productVersion: "corerun",
-            gitHash: "corerun",
+            gitHash: null,
             buildConfiguration: "corerun",
             wasmEnableThreads: false,
             wasmEnableSIMD: true,
diff --git a/src/native/corehost/browserhost/host/index.ts b/src/native/corehost/browserhost/host/index.ts
index e5ad69465288ec..3eadb4cb94c3c6 100644
--- a/src/native/corehost/browserhost/host/index.ts
+++ b/src/native/corehost/browserhost/host/index.ts
@@ -5,6 +5,8 @@ import type { InternalExchange, BrowserHostExports, RuntimeAPI, BrowserHostExpor
 import { InternalExchangeIndex } from "./types";
 import { } from "./cross-linked"; // ensure ambient symbols are declared
 
+import GitHash from "consts:gitHash";
+
 import { runMain, runMainAndExit, registerDllBytes, installVfsFile, loadIcuData, initializeCoreCLR } from "./host";
 
 export function dotnetInitializeModule(internals: InternalExchange): void {
@@ -15,6 +17,9 @@ export function dotnetInitializeModule(internals: InternalExchange): void {
     };
     const runtimeApi = internals[InternalExchangeIndex.RuntimeAPI];
     if (typeof runtimeApi !== "object") throw new Error("Expected internals to have RuntimeAPI");
+    if (runtimeApi.runtimeBuildInfo.gitHash && runtimeApi.runtimeBuildInfo.gitHash !== GitHash) {
+        throw new Error(`Mismatched git hashes between loader and runtime. Loader: ${runtimeApi.runtimeBuildInfo.gitHash}, BrowserHost: ${GitHash}`);
+    }
     Object.assign(runtimeApi, runtimeApiLocal);
 
     internals[InternalExchangeIndex.BrowserHostExportsTable] = browserHostExportsToTable({
diff --git a/src/native/libs/System.Native.Browser/diagnostics/index.ts b/src/native/libs/System.Native.Browser/diagnostics/index.ts
index 0de83b1ebf0ae2..8550abfb275891 100644
--- a/src/native/libs/System.Native.Browser/diagnostics/index.ts
+++ b/src/native/libs/System.Native.Browser/diagnostics/index.ts
@@ -3,6 +3,9 @@
 
 import type { DiagnosticsExportsTable, InternalExchange, DiagnosticsExports } from "./types";
 import { InternalExchangeIndex } from "../types";
+
+import GitHash from "consts:gitHash";
+
 import { dotnetUpdateInternals, dotnetUpdateInternalsSubscriber } from "./cross-module";
 import { registerExit } from "./exit";
 import { symbolicateStackTrace } from "./symbolicate";
@@ -11,6 +14,13 @@ import { installLoggingProxy } from "./console-proxy";
 export function dotnetInitializeModule(internals: InternalExchange): void {
     if (!Array.isArray(internals)) throw new Error("Expected internals to be an array");
 
+    const runtimeApi = internals[InternalExchangeIndex.RuntimeAPI];
+    if (typeof runtimeApi !== "object") throw new Error("Expected internals to have RuntimeAPI");
+
+    if (runtimeApi.runtimeBuildInfo.gitHash && runtimeApi.runtimeBuildInfo.gitHash !== GitHash) {
+        throw new Error(`Mismatched git hashes between loader and runtime. Loader: ${runtimeApi.runtimeBuildInfo.gitHash}, Diagnostics: ${GitHash}`);
+    }
+
     internals[InternalExchangeIndex.DiagnosticsExportsTable] = diagnosticsExportsToTable({
         symbolicateStackTrace,
     });
diff --git a/src/native/libs/System.Native.Browser/libSystem.Native.Browser.footer.js b/src/native/libs/System.Native.Browser/libSystem.Native.Browser.footer.js
index 75d01139c89e4d..ff5f4523b1fc12 100644
--- a/src/native/libs/System.Native.Browser/libSystem.Native.Browser.footer.js
+++ b/src/native/libs/System.Native.Browser/libSystem.Native.Browser.footer.js
@@ -29,6 +29,7 @@
                     }
                 },
                 dotnetInitializeModule: exports.dotnetInitializeModule,
+                gitHash: exports.gitHash,
             },
             $DOTNET__deps: commonDeps,
             $DOTNET__postset: "DOTNET.selfInitialize()",
@@ -36,7 +37,7 @@
 
         for (const exportName of Reflect.ownKeys(exports)) {
             const name = String(exportName);
-            if (name === "dotnetInitializeModule") continue;
+            if (name === "dotnetInitializeModule" || name === "gitHash") continue;
             const fn = lib[name] = exports[name];
             if (fn.__deps) {
                 lib[name + "__deps"] = fn.__deps;
diff --git a/src/native/libs/System.Native.Browser/native/index.ts b/src/native/libs/System.Native.Browser/native/index.ts
index 776f6258ff8859..9bdecaacda58e8 100644
--- a/src/native/libs/System.Native.Browser/native/index.ts
+++ b/src/native/libs/System.Native.Browser/native/index.ts
@@ -4,12 +4,24 @@
 import type { InternalExchange, NativeBrowserExports, NativeBrowserExportsTable } from "../types";
 import { InternalExchangeIndex } from "../types";
 
+import GitHash from "consts:gitHash";
+
 export { SystemJS_RandomBytes } from "./crypto";
 export { SystemJS_GetLocaleInfo } from "./globalization-locale";
 export { SystemJS_RejectMainPromise, SystemJS_ResolveMainPromise, SystemJS_ConsoleClear } from "./main";
 export { SystemJS_ScheduleTimer, SystemJS_ScheduleBackgroundJob } from "./timer";
 
+export const gitHash = GitHash;
 export function dotnetInitializeModule(internals: InternalExchange): void {
+    if (!Array.isArray(internals)) throw new Error("Expected internals to be an array");
+
+    const runtimeApi = internals[InternalExchangeIndex.RuntimeAPI];
+    if (typeof runtimeApi !== "object") throw new Error("Expected internals to have RuntimeAPI");
+
+    if (runtimeApi.runtimeBuildInfo.gitHash && runtimeApi.runtimeBuildInfo.gitHash !== DOTNET.gitHash) {
+        throw new Error(`Mismatched git hashes between loader and runtime. Loader: ${runtimeApi.runtimeBuildInfo.gitHash}, DOTNET: ${DOTNET.gitHash}`);
+    }
+
     internals[InternalExchangeIndex.NativeBrowserExportsTable] = nativeBrowserExportsToTable({
     });
     dotnetUpdateInternals(internals, dotnetUpdateInternalsSubscriber);
diff --git a/src/native/libs/System.Native.Browser/utils/index.ts b/src/native/libs/System.Native.Browser/utils/index.ts
index ec57f307d23d37..95434eb7bd8ae2 100644
--- a/src/native/libs/System.Native.Browser/utils/index.ts
+++ b/src/native/libs/System.Native.Browser/utils/index.ts
@@ -5,6 +5,8 @@ import type { InternalExchange, BrowserUtilsExports, RuntimeAPI, BrowserUtilsExp
 import { InternalExchangeIndex } from "../types";
 import { } from "./cross-module"; // ensure ambient symbols are declared
 
+import GitHash from "consts:gitHash";
+
 import {
     setHeapB32, setHeapB8, setHeapU8, setHeapU16, setHeapU32, setHeapI8, setHeapI16, setHeapI32, setHeapI52, setHeapU52, setHeapI64Big, setHeapF32, setHeapF64,
     getHeapB32, getHeapB8, getHeapU8, getHeapU16, getHeapU32, getHeapI8, getHeapI16, getHeapI32, getHeapI52, getHeapU52, getHeapI64Big, getHeapF32, getHeapF64,
@@ -20,9 +22,15 @@ import { registerRuntime } from "./runtime-list";
 import { registerCDAC } from "./cdac";
 
 export function dotnetInitializeModule(internals: InternalExchange): void {
-    initPolyfills();
+    if (!Array.isArray(internals)) throw new Error("Expected internals to be an array");
     const runtimeApi = internals[InternalExchangeIndex.RuntimeAPI];
     if (typeof runtimeApi !== "object") throw new Error("Expected internals to have RuntimeAPI");
+
+    if (runtimeApi.runtimeBuildInfo.gitHash && runtimeApi.runtimeBuildInfo.gitHash !== GitHash) {
+        throw new Error(`Mismatched git hashes between loader and runtime. Loader: ${runtimeApi.runtimeBuildInfo.gitHash}, BrowserUtils: ${GitHash}`);
+    }
+
+    initPolyfills();
     registerRuntime(runtimeApi);
     registerCDAC(runtimeApi);
 
diff --git a/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/interop/index.ts b/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/interop/index.ts
index 20a0cc4e766b45..a48445f1c938b7 100644
--- a/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/interop/index.ts
+++ b/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/interop/index.ts
@@ -3,17 +3,25 @@
 
 import type { InternalExchange, RuntimeAPI, RuntimeExports, RuntimeExportsTable } from "./types";
 import { InternalExchangeIndex } from "../types";
+
+import GitHash from "consts:gitHash";
+
 import { dotnetUpdateInternals, dotnetUpdateInternalsSubscriber } from "./cross-module";
 import { ENVIRONMENT_IS_NODE } from "./per-module";
 
 export function dotnetInitializeModule(internals: InternalExchange): void {
     if (!Array.isArray(internals)) throw new Error("Expected internals to be an array");
+    const runtimeApi = internals[InternalExchangeIndex.RuntimeAPI];
+    if (typeof runtimeApi !== "object") throw new Error("Expected internals to have RuntimeAPI");
+
+    if (runtimeApi.runtimeBuildInfo.gitHash && runtimeApi.runtimeBuildInfo.gitHash !== GitHash) {
+        throw new Error(`Mismatched git hashes between loader and runtime. Loader: ${runtimeApi.runtimeBuildInfo.gitHash}, Runtime: ${GitHash}`);
+    }
+
     const runtimeApiLocal: Partial<RuntimeAPI> = {
         getAssemblyExports,
         setModuleImports,
     };
-    const runtimeApi = internals[InternalExchangeIndex.RuntimeAPI];
-    if (typeof runtimeApi !== "object") throw new Error("Expected internals to have RuntimeAPI");
     Object.assign(runtimeApi, runtimeApiLocal);
 
     internals[InternalExchangeIndex.RuntimeExportsTable] = runtimeExportsToTable({
diff --git a/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/libSystem.Runtime.InteropServices.JavaScript.Native.footer.js b/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/libSystem.Runtime.InteropServices.JavaScript.Native.footer.js
index 3544781dd9fa2a..08f2c813c3d5a7 100644
--- a/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/libSystem.Runtime.InteropServices.JavaScript.Native.footer.js
+++ b/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/libSystem.Runtime.InteropServices.JavaScript.Native.footer.js
@@ -29,6 +29,7 @@
                     }
                 },
                 dotnetInitializeModule: exports.dotnetInitializeModule,
+                gitHash: exports.gitHash,
             },
             $DOTNET_INTEROP__postset: "DOTNET_INTEROP.selfInitialize()",
             $DOTNET_INTEROP__deps: commonDeps,
@@ -36,7 +37,7 @@
 
         for (const exportName of Reflect.ownKeys(exports)) {
             const name = String(exportName);
-            if (name === "dotnetInitializeModule") continue;
+            if (name === "dotnetInitializeModule" || name === "gitHash") continue;
             lib[name] = exports[name];
         }
 
diff --git a/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/native/cross-linked.ts b/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/native/cross-linked.ts
index ea10f4707c6a6c..f2caa4fb684a7b 100644
--- a/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/native/cross-linked.ts
+++ b/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/native/cross-linked.ts
@@ -3,3 +3,6 @@
 
 import { } from "../../Common/JavaScript/cross-linked";
 
+declare global {
+    export const DOTNET_INTEROP: any;
+}
diff --git a/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/native/index.ts b/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/native/index.ts
index 3dc342b2746f37..021eb895af80a0 100644
--- a/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/native/index.ts
+++ b/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/native/index.ts
@@ -5,6 +5,8 @@ import type { InternalExchange, InteropJavaScriptExports, InteropJavaScriptExpor
 import { InternalExchangeIndex } from "../types";
 import { } from "./cross-linked"; // ensure ambient symbols are declared
 
+import GitHash from "consts:gitHash";
+
 // eslint-disable-next-line @typescript-eslint/no-unused-vars
 export function SystemInteropJS_InvokeJSImportST(function_handle: JSFnHandle, args: JSMarshalerArguments) {
     // WASM-TODO implementation
@@ -12,7 +14,16 @@ export function SystemInteropJS_InvokeJSImportST(function_handle: JSFnHandle, ar
     return - 1;
 }
 
+export const gitHash = GitHash;
 export function dotnetInitializeModule(internals: InternalExchange): void {
+    if (!Array.isArray(internals)) throw new Error("Expected internals to be an array");
+    const runtimeApi = internals[InternalExchangeIndex.RuntimeAPI];
+    if (typeof runtimeApi !== "object") throw new Error("Expected internals to have RuntimeAPI");
+
+    if (runtimeApi.runtimeBuildInfo.gitHash && runtimeApi.runtimeBuildInfo.gitHash !== DOTNET_INTEROP.gitHash) {
+        throw new Error(`Mismatched git hashes between loader and runtime. Loader: ${runtimeApi.runtimeBuildInfo.gitHash}, DOTNET_INTEROP: ${DOTNET_INTEROP.gitHash}`);
+    }
+
     internals[InternalExchangeIndex.InteropJavaScriptExportsTable] = interopJavaScriptExportsToTable({
     });
     // eslint-disable-next-line @typescript-eslint/no-unused-vars