diff --git a/extensions/copilot/package-lock.json b/extensions/copilot/package-lock.json
index 5b2fbffe3cc..43942fe8aa8 100644
--- a/extensions/copilot/package-lock.json
+++ b/extensions/copilot/package-lock.json
@@ -43,7 +43,7 @@
 				"applicationinsights": "^2.9.7",
 				"best-effort-json-parser": "^1.2.1",
 				"diff": "^8.0.3",
-				"dompurify": "^3.4.0",
+				"dompurify": "^3.4.1",
 				"express": "^5.2.1",
 				"ignore": "^7.0.5",
 				"isbinaryfile": "^5.0.4",
@@ -11230,9 +11230,9 @@
 			}
 		},
 		"node_modules/dompurify": {
-			"version": "3.4.0",
-			"resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.4.0.tgz",
-			"integrity": "sha512-nolgK9JcaUXMSmW+j1yaSvaEaoXYHwWyGJlkoCTghc97KgGDDSnpoU/PlEnw63Ah+TGKFOyY+X5LnxaWbCSfXg==",
+			"version": "3.4.1",
+			"resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.4.1.tgz",
+			"integrity": "sha512-JahakDAIg1gyOm7dlgWSDjV4n7Ip2PKR55NIT6jrMfIgLFgWo81vdr1/QGqWtFNRqXP9UV71oVePtjqS2ebnPw==",
 			"license": "(MPL-2.0 OR Apache-2.0)",
 			"optionalDependencies": {
 				"@types/trusted-types": "^2.0.7"
diff --git a/extensions/copilot/package.json b/extensions/copilot/package.json
index 112aca191a8..10e21f7bb77 100644
--- a/extensions/copilot/package.json
+++ b/extensions/copilot/package.json
@@ -6640,7 +6640,7 @@
 		"applicationinsights": "^2.9.7",
 		"best-effort-json-parser": "^1.2.1",
 		"diff": "^8.0.3",
-		"dompurify": "^3.4.0",
+		"dompurify": "^3.4.1",
 		"express": "^5.2.1",
 		"ignore": "^7.0.5",
 		"isbinaryfile": "^5.0.4",
diff --git a/extensions/markdown-language-features/package-lock.json b/extensions/markdown-language-features/package-lock.json
index 0c740aa96e0..e586004bde9 100644
--- a/extensions/markdown-language-features/package-lock.json
+++ b/extensions/markdown-language-features/package-lock.json
@@ -10,7 +10,7 @@
       "license": "MIT",
       "dependencies": {
         "@vscode/extension-telemetry": "^0.9.8",
-        "dompurify": "^3.3.2",
+        "dompurify": "^3.4.1",
         "highlight.js": "^11.8.0",
         "markdown-it": "^12.3.2",
         "markdown-it-front-matter": "^0.2.4",
@@ -385,9 +385,9 @@
       }
     },
     "node_modules/dompurify": {
-      "version": "3.4.0",
-      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.4.0.tgz",
-      "integrity": "sha512-nolgK9JcaUXMSmW+j1yaSvaEaoXYHwWyGJlkoCTghc97KgGDDSnpoU/PlEnw63Ah+TGKFOyY+X5LnxaWbCSfXg==",
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.4.1.tgz",
+      "integrity": "sha512-JahakDAIg1gyOm7dlgWSDjV4n7Ip2PKR55NIT6jrMfIgLFgWo81vdr1/QGqWtFNRqXP9UV71oVePtjqS2ebnPw==",
       "license": "(MPL-2.0 OR Apache-2.0)",
       "optionalDependencies": {
         "@types/trusted-types": "^2.0.7"
diff --git a/extensions/markdown-language-features/package.json b/extensions/markdown-language-features/package.json
index b33ea5e4614..1494b384676 100644
--- a/extensions/markdown-language-features/package.json
+++ b/extensions/markdown-language-features/package.json
@@ -782,7 +782,7 @@
   },
   "dependencies": {
     "@vscode/extension-telemetry": "^0.9.8",
-    "dompurify": "^3.3.2",
+    "dompurify": "^3.4.1",
     "highlight.js": "^11.8.0",
     "markdown-it": "^12.3.2",
     "markdown-it-front-matter": "^0.2.4",
diff --git a/extensions/mermaid-chat-features/package-lock.json b/extensions/mermaid-chat-features/package-lock.json
index d49d385f93a..718056e9037 100644
--- a/extensions/mermaid-chat-features/package-lock.json
+++ b/extensions/mermaid-chat-features/package-lock.json
@@ -9,7 +9,7 @@
       "version": "10.0.0",
       "license": "MIT",
       "dependencies": {
-        "dompurify": "^3.4.0",
+        "dompurify": "^3.4.1",
         "mermaid": "^11.12.3"
       },
       "devDependencies": {
@@ -974,9 +974,9 @@
       }
     },
     "node_modules/dompurify": {
-      "version": "3.4.0",
-      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.4.0.tgz",
-      "integrity": "sha512-nolgK9JcaUXMSmW+j1yaSvaEaoXYHwWyGJlkoCTghc97KgGDDSnpoU/PlEnw63Ah+TGKFOyY+X5LnxaWbCSfXg==",
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.4.1.tgz",
+      "integrity": "sha512-JahakDAIg1gyOm7dlgWSDjV4n7Ip2PKR55NIT6jrMfIgLFgWo81vdr1/QGqWtFNRqXP9UV71oVePtjqS2ebnPw==",
       "license": "(MPL-2.0 OR Apache-2.0)",
       "optionalDependencies": {
         "@types/trusted-types": "^2.0.7"
diff --git a/extensions/mermaid-chat-features/package.json b/extensions/mermaid-chat-features/package.json
index 3cd9b04b73e..9c89cebfd7c 100644
--- a/extensions/mermaid-chat-features/package.json
+++ b/extensions/mermaid-chat-features/package.json
@@ -130,7 +130,7 @@
     "@vscode/codicons": "^0.0.36"
   },
   "dependencies": {
-    "dompurify": "^3.4.0",
+    "dompurify": "^3.4.1",
     "mermaid": "^11.12.3"
   },
   "overrides": {