diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index 3326a32ce7..36bcc60abd 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -39,8 +39,6 @@ export type {
   Build,
   BuildOptions,
   BundlerPluginInstance,
-  CacheGroup,
-  CacheGroups,
   Charset,
   ClientConfig,
   CliShortcut,
diff --git a/packages/core/src/plugins/moduleFederation.ts b/packages/core/src/plugins/moduleFederation.ts
index 0f1c14d381..0917f2342e 100644
--- a/packages/core/src/plugins/moduleFederation.ts
+++ b/packages/core/src/plugins/moduleFederation.ts
@@ -1,7 +1,7 @@
 import { isRegExp } from 'node:util/types';
 import { rspack } from '@rspack/core';
 import type { RspackPluginInstance } from '@rspack/core';
-import type { CacheGroup, RsbuildPlugin, Rspack } from '../types';
+import type { RsbuildPlugin, Rspack } from '../types';
 
 /**
  * Force remote entry not be affected by user's chunkSplit strategy,
@@ -22,14 +22,18 @@ class PatchSplitChunksPlugin implements RspackPluginInstance {
       return;
     }
 
-    const applyPatch = (cacheGroup: CacheGroup) => {
-      if (typeof cacheGroup !== 'object' || isRegExp(cacheGroup)) {
+    const applyPatch = (
+      config:
+        | Rspack.OptimizationSplitChunksCacheGroup
+        | Rspack.OptimizationSplitChunksOptions,
+    ) => {
+      if (typeof config !== 'object' || isRegExp(config)) {
         return;
       }
 
       // cacheGroup.chunks will inherit splitChunks.chunks
       // so we only need to modify the chunks that are set separately.
-      const { chunks } = cacheGroup;
+      const { chunks } = config;
       if (!chunks || chunks === 'async') {
         return;
       }
@@ -37,7 +41,7 @@ class PatchSplitChunksPlugin implements RspackPluginInstance {
       if (typeof chunks === 'function') {
         const prevChunks = chunks;
 
-        cacheGroup.chunks = (chunk) => {
+        config.chunks = (chunk) => {
           if (chunk.name && chunk.name === this.name) {
             return false;
           }
@@ -47,7 +51,7 @@ class PatchSplitChunksPlugin implements RspackPluginInstance {
       }
 
       if (chunks === 'all') {
-        cacheGroup.chunks = (chunk) => {
+        config.chunks = (chunk) => {
           if (chunk.name && chunk.name === this.name) {
             return false;
           }
@@ -57,7 +61,7 @@ class PatchSplitChunksPlugin implements RspackPluginInstance {
       }
 
       if (chunks === 'initial') {
-        cacheGroup.chunks = (chunk) => {
+        config.chunks = (chunk) => {
           if (chunk.name && chunk.name === this.name) {
             return false;
           }
@@ -77,7 +81,9 @@ class PatchSplitChunksPlugin implements RspackPluginInstance {
 
     // patch splitChunk.cacheGroups[key].chunks
     for (const cacheGroupKey of Object.keys(cacheGroups)) {
-      applyPatch(cacheGroups[cacheGroupKey]);
+      if (cacheGroups[cacheGroupKey]) {
+        applyPatch(cacheGroups[cacheGroupKey]);
+      }
     }
   }
 }
diff --git a/packages/core/src/plugins/splitChunks.ts b/packages/core/src/plugins/splitChunks.ts
index 6d3b9388e8..1cf76a50f8 100644
--- a/packages/core/src/plugins/splitChunks.ts
+++ b/packages/core/src/plugins/splitChunks.ts
@@ -1,14 +1,16 @@
 import assert from 'node:assert';
 import { NODE_MODULES_REGEX } from '../constants';
 import type {
-  CacheGroups,
   ForceSplitting,
   Polyfill,
   RsbuildChunkSplit,
   RsbuildPlugin,
+  Rspack,
   SplitChunks,
 } from '../types';
 
+type CacheGroups = Record<string, Rspack.OptimizationSplitChunksCacheGroup>;
+
 // We expose three layers to specify Rspack chunk-split config:
 // 1. By strategy. Some best practices strategies.
 // 2. By forceSplitting config, which is designed to split chunks by user defined rules.That's easier to use than Rspack raw config.
diff --git a/packages/core/src/types/config.ts b/packages/core/src/types/config.ts
index 28e639d77d..f341a38eb6 100644
--- a/packages/core/src/types/config.ts
+++ b/packages/core/src/types/config.ts
@@ -616,24 +616,6 @@ export type SplitChunks = Configuration extends {
   ? P
   : never;
 
-export type CacheGroups = Configuration extends {
-  optimization?: {
-    splitChunks?:
-      | {
-          cacheGroups?: infer P;
-        }
-      | false;
-  };
-}
-  ? P
-  : never;
-
-export type CacheGroup = CacheGroups extends {
-  [key: string]: infer P;
-}
-  ? P
-  : null;
-
 export type ForceSplitting = RegExp[] | Record<string, RegExp>;
 
 export interface BaseSplitRules {
diff --git a/packages/plugin-react/src/splitChunks.ts b/packages/plugin-react/src/splitChunks.ts
index fea64cd00a..71f5efdee1 100644
--- a/packages/plugin-react/src/splitChunks.ts
+++ b/packages/plugin-react/src/splitChunks.ts
@@ -1,4 +1,4 @@
-import type { CacheGroups, RsbuildPluginAPI, SplitChunks } from '@rsbuild/core';
+import type { RsbuildPluginAPI, Rspack, SplitChunks } from '@rsbuild/core';
 import type { SplitReactChunkOptions } from './index.js';
 
 const isPlainObject = (obj: unknown): obj is Record<string, any> =>
@@ -24,7 +24,10 @@ export const applySplitChunksRule = (
       return;
     }
 
-    const extraGroups: CacheGroups = {};
+    const extraGroups: Record<
+      string,
+      Rspack.OptimizationSplitChunksCacheGroup
+    > = {};
 
     if (options.react) {
       extraGroups.react = {
diff --git a/packages/plugin-vue/src/splitChunks.ts b/packages/plugin-vue/src/splitChunks.ts
index c4fc641556..d594d30cc8 100644
--- a/packages/plugin-vue/src/splitChunks.ts
+++ b/packages/plugin-vue/src/splitChunks.ts
@@ -1,4 +1,4 @@
-import type { CacheGroups, RsbuildPluginAPI, SplitChunks } from '@rsbuild/core';
+import type { RsbuildPluginAPI, Rspack, SplitChunks } from '@rsbuild/core';
 import type { SplitVueChunkOptions } from './index.js';
 
 const isPlainObject = (obj: unknown): obj is Record<string, any> =>
@@ -24,7 +24,10 @@ export const applySplitChunksRule = (
       return;
     }
 
-    const extraGroups: CacheGroups = {};
+    const extraGroups: Record<
+      string,
+      Rspack.OptimizationSplitChunksCacheGroup
+    > = {};
 
     if (options.vue) {
       extraGroups.vue = {