diff --git a/CHANGELOG.md b/CHANGELOG.md
index aa718ab441..def949725f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,6 +31,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Change translation from jp-JP to ja-JP - @gibkigonzo (#3824)
 - Fixed ecosystem config for pm2 - @andrzejewsky (#3842)
 - Fixed `mappingFallback` for extending modules -  @andrzejewsky (#3822)
+- Fixed some potential mutations of Config object in `catalog` and `catalog-next` - @grimasod (#3843)
 
 ### Changed / Improved
 - Changed pre commit hook to use NODE_ENV production to check for debugger statements - @resubaka (#3686)
diff --git a/core/modules/catalog-next/store/category/actions.ts b/core/modules/catalog-next/store/category/actions.ts
index 53ab1fa6e2..06b514ef47 100644
--- a/core/modules/catalog-next/store/category/actions.ts
+++ b/core/modules/catalog-next/store/category/actions.ts
@@ -20,6 +20,7 @@ import { preConfigureProduct } from '@vue-storefront/core/modules/catalog/helper
 import chunk from 'lodash-es/chunk'
 import Product from 'core/modules/catalog/types/Product';
 import omit from 'lodash-es/omit'
+import cloneDeep from 'lodash-es/cloneDeep'
 import config from 'config'
 import { parseCategoryPath } from '@vue-storefront/core/modules/breadcrumbs/helpers'
 
@@ -140,7 +141,7 @@ const actions: ActionTree<CategoryState, RootState> = {
       categorySearchOptions.filters.id = searchedIds.filter(categoryId => !getters.getCategoriesMap[categoryId] && !getters.getNotFoundCategoryIds.includes(categoryId))
     }
     if (!searchingByIds || categorySearchOptions.filters.id.length) {
-      categorySearchOptions.filters = Object.assign(config.entities.category.filterFields, categorySearchOptions.filters)
+      categorySearchOptions.filters = Object.assign(cloneDeep(config.entities.category.filterFields), categorySearchOptions.filters ? cloneDeep(categorySearchOptions.filters) : {})
       const categories = await CategoryService.getCategories(categorySearchOptions)
       const notFoundCategories = searchedIds.filter(categoryId => !categories.some(cat => cat.id === parseInt(categoryId)))
 
@@ -176,7 +177,7 @@ const actions: ActionTree<CategoryState, RootState> = {
     let resultFilters = aggregationFilters
     const filtersKeys = Object.keys(filters)
     if (categoryMappedFilters && filtersKeys.length) {
-      resultFilters = Object.assign({}, categoryMappedFilters, omit(aggregationFilters, filtersKeys))
+      resultFilters = Object.assign(cloneDeep(categoryMappedFilters), cloneDeep(omit(aggregationFilters, filtersKeys)))
     }
     commit(types.CATEGORY_SET_CATEGORY_FILTERS, {category, filters: resultFilters})
   },
diff --git a/core/modules/catalog/store/product/actions.ts b/core/modules/catalog/store/product/actions.ts
index 671f8b84c3..f38cc3577f 100644
--- a/core/modules/catalog/store/product/actions.ts
+++ b/core/modules/catalog/store/product/actions.ts
@@ -19,6 +19,7 @@ import { optionLabel } from '../../helpers/optionLabel'
 import { isOnline } from '@vue-storefront/core/lib/search'
 import omit from 'lodash-es/omit'
 import trim from 'lodash-es/trim'
+import cloneDeep from 'lodash-es/cloneDeep'
 import uniqBy from 'lodash-es/uniqBy'
 import rootStore from '@vue-storefront/core/store'
 import RootState from '@vue-storefront/core/types/RootState'
@@ -684,7 +685,7 @@ const actions: ActionTree<ProductState, RootState> = {
     if (product && product.category_ids) {
       let currentCategory = rootGetters['category-next/getCurrentCategory'] // use current category, if set
       if (!currentCategory || !currentCategory.id || !product.category_ids.includes(currentCategory.id.toString())) {
-        const categoryFilters = Object.assign({ 'id': product.category_ids }, config.entities.category.breadcrumbFilterFields)
+        const categoryFilters = Object.assign({ 'id': [...product.category_ids] }, cloneDeep(config.entities.category.breadcrumbFilterFields))
         const categories = await dispatch('category-next/loadCategories', {filters: categoryFilters}, { root: true })
         currentCategory = categories.sort((a, b) => (a.level > b.level) ? -1 : 1)[0] // sort starting by deepest level
       }