diff --git a/e2e/cases/plugin-svelte/package.json b/e2e/cases/plugin-svelte/package.json
index 8106872f88..bf12daf99f 100644
--- a/e2e/cases/plugin-svelte/package.json
+++ b/e2e/cases/plugin-svelte/package.json
@@ -3,7 +3,7 @@
   "name": "@e2e/svelte",
   "version": "1.0.0",
   "dependencies": {
-    "svelte": "^5.42.2"
+    "svelte": "^5.43.2"
   },
   "devDependencies": {
     "less": "4.3.0",
diff --git a/examples/svelte/package.json b/examples/svelte/package.json
index a76c8edb96..1cbb19c1ea 100644
--- a/examples/svelte/package.json
+++ b/examples/svelte/package.json
@@ -8,7 +8,7 @@
     "preview": "rsbuild preview"
   },
   "dependencies": {
-    "svelte": "^5.42.2"
+    "svelte": "^5.43.2"
   },
   "devDependencies": {
     "@rsbuild/core": "workspace:*",
diff --git a/packages/create-rsbuild/template-svelte-js/package.json b/packages/create-rsbuild/template-svelte-js/package.json
index 2dd0cf91ab..0cab86358c 100644
--- a/packages/create-rsbuild/template-svelte-js/package.json
+++ b/packages/create-rsbuild/template-svelte-js/package.json
@@ -9,7 +9,7 @@
     "preview": "rsbuild preview"
   },
   "dependencies": {
-    "svelte": "^5.42.2"
+    "svelte": "^5.43.2"
   },
   "devDependencies": {
     "@rsbuild/core": "^1.6.0",
diff --git a/packages/create-rsbuild/template-svelte-ts/package.json b/packages/create-rsbuild/template-svelte-ts/package.json
index fa58817c76..cd5af38dd8 100644
--- a/packages/create-rsbuild/template-svelte-ts/package.json
+++ b/packages/create-rsbuild/template-svelte-ts/package.json
@@ -10,7 +10,7 @@
     "svelte-check": "svelte-check --tsconfig ./tsconfig.json"
   },
   "dependencies": {
-    "svelte": "^5.42.2"
+    "svelte": "^5.43.2"
   },
   "devDependencies": {
     "@rsbuild/core": "^1.6.0",
diff --git a/packages/plugin-svelte/package.json b/packages/plugin-svelte/package.json
index da9ef09511..342ade8f3a 100644
--- a/packages/plugin-svelte/package.json
+++ b/packages/plugin-svelte/package.json
@@ -35,7 +35,7 @@
     "@rslib/core": "0.17.0",
     "@scripts/test-helper": "workspace:*",
     "@types/node": "^22.18.13",
-    "svelte": "^5.42.2",
+    "svelte": "^5.43.2",
     "typescript": "^5.9.3"
   },
   "peerDependencies": {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index b88390ca5a..75fe3376be 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -251,8 +251,8 @@ importers:
   e2e/cases/plugin-svelte:
     dependencies:
       svelte:
-        specifier: ^5.42.2
-        version: 5.42.2
+        specifier: ^5.43.2
+        version: 5.43.2
     devDependencies:
       less:
         specifier: 4.3.0
@@ -465,8 +465,8 @@ importers:
   examples/svelte:
     dependencies:
       svelte:
-        specifier: ^5.42.2
-        version: 5.42.2
+        specifier: ^5.43.2
+        version: 5.43.2
     devDependencies:
       '@rsbuild/core':
         specifier: workspace:*
@@ -1043,10 +1043,10 @@ importers:
     dependencies:
       svelte-loader:
         specifier: 3.2.4
-        version: 3.2.4(svelte@5.42.2)
+        version: 3.2.4(svelte@5.43.2)
       svelte-preprocess:
         specifier: ^6.0.3
-        version: 6.0.3(@babel/core@7.28.5)(less@4.3.0)(postcss-load-config@6.0.1(jiti@2.6.1)(postcss@8.5.6)(yaml@2.8.1))(postcss@8.5.6)(sass@1.93.2)(stylus@0.64.0)(svelte@5.42.2)(typescript@5.9.3)
+        version: 6.0.3(@babel/core@7.28.5)(less@4.3.0)(postcss-load-config@6.0.1(jiti@2.6.1)(postcss@8.5.6)(yaml@2.8.1))(postcss@8.5.6)(sass@1.93.2)(stylus@0.64.0)(svelte@5.43.2)(typescript@5.9.3)
     devDependencies:
       '@rsbuild/core':
         specifier: workspace:*
@@ -1061,8 +1061,8 @@ importers:
         specifier: ^22.18.13
         version: 22.18.13
       svelte:
-        specifier: ^5.42.2
-        version: 5.42.2
+        specifier: ^5.43.2
+        version: 5.43.2
       typescript:
         specifier: ^5.9.3
         version: 5.9.3
@@ -6404,8 +6404,8 @@ packages:
       typescript:
         optional: true
 
-  svelte@5.42.2:
-    resolution: {integrity: sha512-iSry5jsBHispVczyt9UrBX/1qu3HQ/UyKPAIjqlvlu3o/eUvc+kpyMyRS2O4HLLx4MvLurLGIUOyyP11pyD59g==}
+  svelte@5.43.2:
+    resolution: {integrity: sha512-ro1umEzX8rT5JpCmlf0PPv7ncD8MdVob9e18bhwqTKNoLjS8kDvhVpaoYVPc+qMwDAOfcwJtyY7ZFSDbOaNPgA==}
     engines: {node: '>=18'}
 
   svg-parser@2.0.4:
@@ -12534,20 +12534,20 @@ snapshots:
 
   svelte-dev-helper@1.1.9: {}
 
-  svelte-hmr@0.14.12(svelte@5.42.2):
+  svelte-hmr@0.14.12(svelte@5.43.2):
     dependencies:
-      svelte: 5.42.2
+      svelte: 5.43.2
 
-  svelte-loader@3.2.4(svelte@5.42.2):
+  svelte-loader@3.2.4(svelte@5.43.2):
     dependencies:
       loader-utils: 2.0.4
-      svelte: 5.42.2
+      svelte: 5.43.2
       svelte-dev-helper: 1.1.9
-      svelte-hmr: 0.14.12(svelte@5.42.2)
+      svelte-hmr: 0.14.12(svelte@5.43.2)
 
-  svelte-preprocess@6.0.3(@babel/core@7.28.5)(less@4.3.0)(postcss-load-config@6.0.1(jiti@2.6.1)(postcss@8.5.6)(yaml@2.8.1))(postcss@8.5.6)(sass@1.93.2)(stylus@0.64.0)(svelte@5.42.2)(typescript@5.9.3):
+  svelte-preprocess@6.0.3(@babel/core@7.28.5)(less@4.3.0)(postcss-load-config@6.0.1(jiti@2.6.1)(postcss@8.5.6)(yaml@2.8.1))(postcss@8.5.6)(sass@1.93.2)(stylus@0.64.0)(svelte@5.43.2)(typescript@5.9.3):
     dependencies:
-      svelte: 5.42.2
+      svelte: 5.43.2
     optionalDependencies:
       '@babel/core': 7.28.5
       less: 4.3.0
@@ -12557,7 +12557,7 @@ snapshots:
       stylus: 0.64.0
       typescript: 5.9.3
 
-  svelte@5.42.2:
+  svelte@5.43.2:
     dependencies:
       '@jridgewell/remapping': 2.3.5
       '@jridgewell/sourcemap-codec': 1.5.5