diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 30ecc7c694e..41449ee6afd 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -394,8 +394,8 @@ importers:
         specifier: ^4.2.2
         version: 4.3.1(postcss@8.4.32)
       postcss-nesting:
-        specifier: ^12.0.2
-        version: 12.0.4(postcss@8.4.32)
+        specifier: ^12.1.5
+        version: 12.1.5(postcss@8.4.32)
       postcss-pxtorem:
         specifier: ^6.0.0
         version: 6.1.0(postcss@8.4.32)
@@ -3447,6 +3447,15 @@ packages:
       postcss: 8.4.32
     dev: true
 
+  /@csstools/selector-resolve-nested@1.1.0(postcss-selector-parser@6.1.0):
+    resolution: {integrity: sha512-uWvSaeRcHyeNenKg8tp17EVDRkpflmdyvbE0DHo6D/GdBb6PDnCYYU6gRpXhtICMGMcahQmj2zGxwFM/WC8hCg==}
+    engines: {node: ^14 || ^16 || >=18}
+    peerDependencies:
+      postcss-selector-parser: ^6.0.13
+    dependencies:
+      postcss-selector-parser: 6.1.0
+    dev: true
+
   /@csstools/selector-specificity@2.0.2(postcss-selector-parser@6.0.15)(postcss@8.4.32):
     resolution: {integrity: sha512-IkpVW/ehM1hWKln4fCA3NzJU8KwD+kIOvPZA4cqxoJHtE21CCzjyp+Kxbu0i5I4tBNOlXPL9mjwnWlL0VEG4Fg==}
     engines: {node: ^12 || ^14 || >=16}
@@ -3457,13 +3466,13 @@ packages:
       postcss: 8.4.32
       postcss-selector-parser: 6.0.15
 
-  /@csstools/selector-specificity@3.0.2(postcss-selector-parser@6.0.15):
-    resolution: {integrity: sha512-RpHaZ1h9LE7aALeQXmXrJkRG84ZxIsctEN2biEUmFyKpzFM3zZ35eUMcIzZFsw/2olQE6v69+esEqU2f1MKycg==}
+  /@csstools/selector-specificity@3.1.1(postcss-selector-parser@6.1.0):
+    resolution: {integrity: sha512-a7cxGcJ2wIlMFLlh8z2ONm+715QkPHiyJcxwQlKOz/03GPw1COpfhcmC9wm4xlZfp//jWHNNMwzjtqHXVWU9KA==}
     engines: {node: ^14 || ^16 || >=18}
     peerDependencies:
       postcss-selector-parser: ^6.0.13
     dependencies:
-      postcss-selector-parser: 6.0.15
+      postcss-selector-parser: 6.1.0
     dev: true
 
   /@discoveryjs/json-ext@0.5.7:
@@ -18597,7 +18606,7 @@ packages:
       postcss: ^8.2.2
     dependencies:
       postcss: 8.4.32
-      postcss-selector-parser: 6.0.15
+      postcss-selector-parser: 6.1.0
       postcss-value-parser: 4.2.0
     dev: true
 
@@ -18752,7 +18761,7 @@ packages:
       caniuse-api: 3.0.0
       cssnano-utils: 3.1.0(postcss@8.4.32)
       postcss: 8.4.32
-      postcss-selector-parser: 6.0.15
+      postcss-selector-parser: 6.1.0
     dev: true
 
   /postcss-minify-font-values@5.1.0(postcss@8.4.32):
@@ -18796,7 +18805,7 @@ packages:
       postcss: ^8.2.15
     dependencies:
       postcss: 8.4.32
-      postcss-selector-parser: 6.0.15
+      postcss-selector-parser: 6.1.0
     dev: true
 
   /postcss-mixins@9.0.4(postcss@8.4.32):
@@ -18829,7 +18838,7 @@ packages:
     dependencies:
       icss-utils: 5.1.0(postcss@8.4.32)
       postcss: 8.4.32
-      postcss-selector-parser: 6.0.15
+      postcss-selector-parser: 6.1.0
       postcss-value-parser: 4.2.0
     dev: true
 
@@ -18840,7 +18849,7 @@ packages:
       postcss: ^8.1.0
     dependencies:
       postcss: 8.4.32
-      postcss-selector-parser: 6.0.15
+      postcss-selector-parser: 6.1.0
     dev: true
 
   /postcss-modules-values@4.0.0(postcss@8.4.32):
@@ -18869,15 +18878,16 @@ packages:
       string-hash: 1.1.3
     dev: true
 
-  /postcss-nesting@12.0.4(postcss@8.4.32):
-    resolution: {integrity: sha512-WuCe0KnP4vKjLZK8VNoUWKL8ZLOv/5jiM94mHcI3VszLropHwmjotdUyP/ObzqZpXuQKP2Jf9R12vIHKFSStKw==}
+  /postcss-nesting@12.1.5(postcss@8.4.32):
+    resolution: {integrity: sha512-N1NgI1PDCiAGWPTYrwqm8wpjv0bgDmkYHH72pNsqTCv9CObxjxftdYu6AKtGN+pnJa7FQjMm3v4sp8QJbFsYdQ==}
     engines: {node: ^14 || ^16 || >=18}
     peerDependencies:
       postcss: ^8.4
     dependencies:
-      '@csstools/selector-specificity': 3.0.2(postcss-selector-parser@6.0.15)
+      '@csstools/selector-resolve-nested': 1.1.0(postcss-selector-parser@6.1.0)
+      '@csstools/selector-specificity': 3.1.1(postcss-selector-parser@6.1.0)
       postcss: 8.4.32
-      postcss-selector-parser: 6.0.15
+      postcss-selector-parser: 6.1.0
     dev: true
 
   /postcss-normalize-charset@5.1.0(postcss@8.4.32):
@@ -19037,6 +19047,14 @@ packages:
       cssesc: 3.0.0
       util-deprecate: 1.0.2
 
+  /postcss-selector-parser@6.1.0:
+    resolution: {integrity: sha512-UMz42UD0UY0EApS0ZL9o1XnLhSTtvvvLe5Dc2H2O56fvRZi+KulDyf5ctDhhtYJBGKStV2FL1fy6253cmLgqVQ==}
+    engines: {node: '>=4'}
+    dependencies:
+      cssesc: 3.0.0
+      util-deprecate: 1.0.2
+    dev: true
+
   /postcss-simple-vars@7.0.1(postcss@8.4.32):
     resolution: {integrity: sha512-5GLLXaS8qmzHMOjVxqkk1TZPf1jMqesiI7qLhnlyERalG0sMbHIbJqrcnrpmZdKCLglHnRHoEBB61RtGTsj++A==}
     engines: {node: '>=14.0'}
@@ -19072,7 +19090,7 @@ packages:
       postcss: ^8.2.15
     dependencies:
       postcss: 8.4.32
-      postcss-selector-parser: 6.0.15
+      postcss-selector-parser: 6.1.0
     dev: true
 
   /postcss-value-parser@4.2.0:
@@ -21524,7 +21542,7 @@ packages:
     dependencies:
       browserslist: 4.22.2
       postcss: 8.4.32
-      postcss-selector-parser: 6.0.15
+      postcss-selector-parser: 6.1.0
     dev: true
 
   /stylelint-config-prettier@9.0.3(stylelint@14.15.0):
diff --git a/polaris-react/package.json b/polaris-react/package.json
index 3e9e46a55d5..99e123cca7c 100644
--- a/polaris-react/package.json
+++ b/polaris-react/package.json
@@ -108,7 +108,7 @@
     "postcss-loader": "^4.2.0",
     "postcss-mixins": "^9.0.4",
     "postcss-modules": "^4.2.2",
-    "postcss-nesting": "^12.0.2",
+    "postcss-nesting": "^12.1.5",
     "postcss-pxtorem": "^6.0.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",