diff --git a/apps/admin-x-design-system/package.json b/apps/admin-x-design-system/package.json
index 9c3a0949b68..f39a0a2f40f 100644
--- a/apps/admin-x-design-system/package.json
+++ b/apps/admin-x-design-system/package.json
@@ -52,7 +52,7 @@
         "eslint-plugin-tailwindcss": "3.18.2",
         "jsdom": "24.1.3",
         "lodash-es": "4.17.21",
-        "postcss": "8.5.6",
+        "postcss": "8.5.10",
         "postcss-import": "16.1.1",
         "react": "18.3.1",
         "react-dom": "18.3.1",
diff --git a/apps/comments-ui/package.json b/apps/comments-ui/package.json
index 95bd4d8bc54..7aeb5f5cc63 100644
--- a/apps/comments-ui/package.json
+++ b/apps/comments-ui/package.json
@@ -75,7 +75,7 @@
     "eslint-plugin-tailwindcss": "3.18.2",
     "jsdom": "24.1.3",
     "moment": "2.30.1",
-    "postcss": "8.5.6",
+    "postcss": "8.5.10",
     "tailwindcss": "3.4.18",
     "vite": "5.4.20",
     "vite-plugin-css-injected-by-js": "3.5.2",
diff --git a/apps/shade/package.json b/apps/shade/package.json
index f594f8f2607..1354ba5ffe1 100644
--- a/apps/shade/package.json
+++ b/apps/shade/package.json
@@ -51,7 +51,7 @@
         "eslint-plugin-tailwindcss": "3.18.2",
         "jsdom": "24.1.3",
         "lodash-es": "4.17.21",
-        "postcss": "8.5.6",
+        "postcss": "8.5.10",
         "postcss-import": "16.1.1",
         "rollup-plugin-node-builtins": "2.1.2",
         "sinon": "18.0.1",
diff --git a/apps/signup-form/package.json b/apps/signup-form/package.json
index 986b1b7e8d3..a1617ff4ca7 100644
--- a/apps/signup-form/package.json
+++ b/apps/signup-form/package.json
@@ -55,7 +55,7 @@
     "eslint-plugin-react-refresh": "0.4.24",
     "eslint-plugin-tailwindcss": "3.18.2",
     "jsdom": "24.1.3",
-    "postcss": "8.5.6",
+    "postcss": "8.5.10",
     "postcss-import": "16.1.1",
     "prop-types": "15.8.1",
     "rollup-plugin-node-builtins": "2.1.2",
diff --git a/ghost/core/package.json b/ghost/core/package.json
index 087b83a02c0..715b6097327 100644
--- a/ghost/core/package.json
+++ b/ghost/core/package.json
@@ -255,7 +255,7 @@
     "nock": "13.5.6",
     "papaparse": "5.3.2",
     "parse-prometheus-text-format": "1.1.1",
-    "postcss": "8.5.6",
+    "postcss": "8.5.10",
     "postcss-cli": "11.0.1",
     "rewire": "8.0.0",
     "sinon": "18.0.1",
diff --git a/yarn.lock b/yarn.lock
index 3f0dc848051..4bddc1a8521 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8891,9 +8891,9 @@
     postcss-preset-env "^7.3.1"
 
 "@tryghost/errors@1.3.6", "@tryghost/errors@1.3.8", "@tryghost/errors@^1.2.26", "@tryghost/errors@^1.2.3", "@tryghost/errors@^1.3.7", "@tryghost/errors@^1.3.8", "@tryghost/errors@^1.3.9":
-  version "1.3.8"
-  resolved "https://registry.yarnpkg.com/@tryghost/errors/-/errors-1.3.8.tgz#d4212b52e876360b4fa8e303ae13ef86f3e95846"
-  integrity sha512-2+4ExAAWM0rFWC7FlzxQMzIvIEQKt/vQLxLyqJqCmAcJa4i2uqUPJHqd/X5BBRuSTuftgca7EAo7adESbHEkZw==
+  version "1.3.13"
+  resolved "https://registry.yarnpkg.com/@tryghost/errors/-/errors-1.3.13.tgz#e604160bd5a4b26b6c30cdc82dad22d9ce892dce"
+  integrity sha512-sXFcuU8Nn3mDcVrLBLFThQZImn+T2w7v/jJGJzdFnSKJstqxd1LyTRlMjpCpgCnqAgHFCaP+uFg7x4CX64VBJQ==
   dependencies:
     "@stdlib/utils-copy" "^0.2.0"
     uuid "^9.0.0"
@@ -28363,10 +28363,10 @@ postcss-values-parser@^4.0.0:
     is-url-superb "^4.0.0"
     postcss "^7.0.5"
 
-postcss@8.5.6, postcss@^8.1.4, postcss@^8.2.14, postcss@^8.2.15, postcss@^8.3.11, postcss@^8.4.19, postcss@^8.4.28, postcss@^8.4.4, postcss@^8.4.43, postcss@^8.4.47, postcss@^8.5.6:
-  version "8.5.6"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.6.tgz#2825006615a619b4f62a9e7426cc120b349a8f3c"
-  integrity sha512-3Ybi1tAuwAP9s0r1UQ2J4n5Y0G05bJkpUIO0/bI9MhwmD70S5aTWbXGBwxHrelT+XM1k6dM0pk+SwNkpTRN7Pg==
+postcss@8.5.10, postcss@^8.1.4, postcss@^8.2.14, postcss@^8.2.15, postcss@^8.3.11, postcss@^8.4.19, postcss@^8.4.28, postcss@^8.4.4, postcss@^8.4.43, postcss@^8.4.47, postcss@^8.5.6:
+  version "8.5.10"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.10.tgz#8992d8c30acf3f12169e7c09514a12fed7e48356"
+  integrity sha512-pMMHxBOZKFU6HgAZ4eyGnwXF/EvPGGqUr0MnZ5+99485wwW41kW91A4LOGxSHhgugZmSChL5AlElNdwlNgcnLQ==
   dependencies:
     nanoid "^3.3.11"
     picocolors "^1.1.1"