diff --git a/package-lock.json b/package-lock.json
index 1208cb0..a4f5eae 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -27,6 +27,7 @@
         "react-dom": "^19.1.0",
         "react-i18next": "^15.6.0",
         "react-router-dom": "^7.6.2",
+        "sanitize-html": "^2.17.0",
         "sharp": "^0.34.2",
         "socket.io-client": "^4.7.5"
       },
@@ -5265,6 +5266,15 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/deepmerge": {
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/deepmerge/-/deepmerge-4.3.1.tgz",
+      "integrity": "sha512-3sUqbMEc77XqpdNO7FRyRog+eW3ph+GYCbj+rK+uYyRMuwsVy0rMiVtPn+QJlKFvWP/1PYpapqYn0Me2knFn+A==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/default-browser": {
       "version": "5.2.1",
       "resolved": "https://registry.npmjs.org/default-browser/-/default-browser-5.2.1.tgz",
@@ -8886,7 +8896,6 @@
       "version": "3.3.11",
       "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.11.tgz",
       "integrity": "sha512-N8SpfPUnUp1bK+PMYW8qSWdl9U+wwNWI4QKxOYDy9JAro3WMX7p2OeVRF9v+347pnakNevPmiHhNmZ2HbFA76w==",
-      "dev": true,
       "funding": [
         {
           "type": "github",
@@ -9458,6 +9467,12 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/parse-srcset": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/parse-srcset/-/parse-srcset-1.0.2.tgz",
+      "integrity": "sha512-/2qh0lav6CmI15FzA3i/2Bzk2zCgQhGMkvhOhKNcBVQ1ldgpbfiNTVslmooUmWJcADi1f1kIeynbDRVzNlfR6Q==",
+      "license": "MIT"
+    },
     "node_modules/parse5": {
       "version": "7.3.0",
       "resolved": "https://registry.npmjs.org/parse5/-/parse5-7.3.0.tgz",
@@ -9666,7 +9681,6 @@
       "version": "8.5.6",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.6.tgz",
       "integrity": "sha512-3Ybi1tAuwAP9s0r1UQ2J4n5Y0G05bJkpUIO0/bI9MhwmD70S5aTWbXGBwxHrelT+XM1k6dM0pk+SwNkpTRN7Pg==",
-      "dev": true,
       "funding": [
         {
           "type": "opencollective",
@@ -10555,6 +10569,60 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/sanitize-html": {
+      "version": "2.17.0",
+      "resolved": "https://registry.npmjs.org/sanitize-html/-/sanitize-html-2.17.0.tgz",
+      "integrity": "sha512-dLAADUSS8rBwhaevT12yCezvioCA+bmUTPH/u57xKPT8d++voeYE6HeluA/bPbQ15TwDBG2ii+QZIEmYx8VdxA==",
+      "license": "MIT",
+      "dependencies": {
+        "deepmerge": "^4.2.2",
+        "escape-string-regexp": "^4.0.0",
+        "htmlparser2": "^8.0.0",
+        "is-plain-object": "^5.0.0",
+        "parse-srcset": "^1.0.2",
+        "postcss": "^8.3.11"
+      }
+    },
+    "node_modules/sanitize-html/node_modules/entities": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/entities/-/entities-4.5.0.tgz",
+      "integrity": "sha512-V0hjH4dGPh9Ao5p0MoRY6BVqtwCjhz6vI5LT8AJ55H+4g9/4vbHx1I54fS0XuclLhDHArPQCiMjDxjaL8fPxhw==",
+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">=0.12"
+      },
+      "funding": {
+        "url": "https://github.com/fb55/entities?sponsor=1"
+      }
+    },
+    "node_modules/sanitize-html/node_modules/htmlparser2": {
+      "version": "8.0.2",
+      "resolved": "https://registry.npmjs.org/htmlparser2/-/htmlparser2-8.0.2.tgz",
+      "integrity": "sha512-GYdjWKDkbRLkZ5geuHs5NY1puJ+PXwP7+fHPRz06Eirsb9ugf6d8kkXav6ADhcODhFFPMIXyxkxSuMf3D6NCFA==",
+      "funding": [
+        "https://github.com/fb55/htmlparser2?sponsor=1",
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/fb55"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "domelementtype": "^2.3.0",
+        "domhandler": "^5.0.3",
+        "domutils": "^3.0.1",
+        "entities": "^4.4.0"
+      }
+    },
+    "node_modules/sanitize-html/node_modules/is-plain-object": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/is-plain-object/-/is-plain-object-5.0.0.tgz",
+      "integrity": "sha512-VRSzKkbMm5jMDoKLbltAkFQ5Qr7VDiTFGXxYFXXowVj387GeGNOCsOH6Msy00SGZ3Fp84b1Naa1psqgcCIEP5Q==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/saxes": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/saxes/-/saxes-6.0.0.tgz",
@@ -11227,7 +11295,6 @@
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.2.1.tgz",
       "integrity": "sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA==",
-      "dev": true,
       "license": "BSD-3-Clause",
       "engines": {
         "node": ">=0.10.0"
diff --git a/package.json b/package.json
index c540d5f..e3a79b2 100644
--- a/package.json
+++ b/package.json
@@ -45,6 +45,7 @@
     "react-dom": "^19.1.0",
     "react-i18next": "^15.6.0",
     "react-router-dom": "^7.6.2",
+    "sanitize-html": "^2.17.0",
     "sharp": "^0.34.2",
     "socket.io-client": "^4.7.5"
   },
diff --git a/src/PrerenderProduct.js b/src/PrerenderProduct.js
index 4221a26..11f7b28 100644
--- a/src/PrerenderProduct.js
+++ b/src/PrerenderProduct.js
@@ -9,6 +9,7 @@ import {
   Toolbar,
   Button
 } from '@mui/material';
+import sanitizeHtml from 'sanitize-html';
 import Footer from './components/Footer.js';
 import { Logo } from './components/header/index.js';
 import ProductImage from './components/ProductImage.js';
@@ -539,7 +540,17 @@ class PrerenderProduct extends React.Component {
             React.createElement(
               'div',
               { 
-                dangerouslySetInnerHTML: { __html: product.description },
+                dangerouslySetInnerHTML: { 
+                  __html: sanitizeHtml(product.description, {
+                    allowedTags: sanitizeHtml.defaults.allowedTags.concat(['img']),
+                    allowedAttributes: {
+                      '*': ['class', 'style'],
+                      'a': ['href', 'title'],
+                      'img': ['src', 'alt', 'width', 'height']
+                    },
+                    disallowedTagsMode: 'discard'
+                  })
+                },
                 style: { 
                   fontFamily: '"Roboto","Helvetica","Arial",sans-serif',
                   fontSize: '1rem',
diff --git a/src/components/ProductDetailPage.js b/src/components/ProductDetailPage.js
index db5e154..be3362a 100644
--- a/src/components/ProductDetailPage.js
+++ b/src/components/ProductDetailPage.js
@@ -9,6 +9,7 @@ import LinkIcon from "@mui/icons-material/Link";
 import CodeIcon from "@mui/icons-material/Code";
 import { Link } from "react-router-dom";
 import parse from "html-react-parser";
+import sanitizeHtml from "sanitize-html";
 import AddToCartButton from "./AddToCartButton.js";
 import ProductImage from "./ProductImage.js";
 import Product from "./Product.js";
@@ -1314,9 +1315,16 @@ class ProductDetailPage extends Component {
                 "& strong": { fontWeight: 600 },
               }}
             >
-              {product.description ? (
-                parse(product.description)
-              ) : upgrading ? (
+              {product.description ? (() => {
+                try {
+                  // Sanitize HTML to remove invalid tags
+                  return parse(sanitizeHtml(product.description));
+                } catch (error) {
+                  console.warn('Failed to parse product description HTML:', error);
+                  // Fallback to rendering as plain text if HTML parsing fails
+                  return <span>{product.description}</span>;
+                }
+              })() : upgrading ? (
                 <Box sx={{ textAlign: "center", py: 2 }}>
                   <Typography variant="body1" color="text.secondary">
                     {this.props.t ? this.props.t('product.loadingDescription') : 'Produktbeschreibung wird geladen...'}