diff --git a/frontend/src/components/ai-elements/open-in-chat.tsx b/frontend/src/components/ai-elements/open-in-chat.tsx
index 0c62a6ac4..b86e93db5 100644
--- a/frontend/src/components/ai-elements/open-in-chat.tsx
+++ b/frontend/src/components/ai-elements/open-in-chat.tsx
@@ -253,7 +253,7 @@ export const OpenInChatGPT = (props: OpenInChatGPTProps) => {
       <a
         className="flex items-center gap-2"
         href={providers.chatgpt.createUrl(query)}
-        rel="noopener"
+        rel="noopener noreferrer"
         target="_blank"
       >
         <span className="shrink-0">{providers.chatgpt.icon}</span>
@@ -273,7 +273,7 @@ export const OpenInClaude = (props: OpenInClaudeProps) => {
       <a
         className="flex items-center gap-2"
         href={providers.claude.createUrl(query)}
-        rel="noopener"
+        rel="noopener noreferrer"
         target="_blank"
       >
         <span className="shrink-0">{providers.claude.icon}</span>
@@ -293,7 +293,7 @@ export const OpenInT3 = (props: OpenInT3Props) => {
       <a
         className="flex items-center gap-2"
         href={providers.t3.createUrl(query)}
-        rel="noopener"
+        rel="noopener noreferrer"
         target="_blank"
       >
         <span className="shrink-0">{providers.t3.icon}</span>
@@ -313,7 +313,7 @@ export const OpenInScira = (props: OpenInSciraProps) => {
       <a
         className="flex items-center gap-2"
         href={providers.scira.createUrl(query)}
-        rel="noopener"
+        rel="noopener noreferrer"
         target="_blank"
       >
         <span className="shrink-0">{providers.scira.icon}</span>
@@ -333,7 +333,7 @@ export const OpenInv0 = (props: OpenInv0Props) => {
       <a
         className="flex items-center gap-2"
         href={providers.v0.createUrl(query)}
-        rel="noopener"
+        rel="noopener noreferrer"
         target="_blank"
       >
         <span className="shrink-0">{providers.v0.icon}</span>
@@ -353,7 +353,7 @@ export const OpenInCursor = (props: OpenInCursorProps) => {
       <a
         className="flex items-center gap-2"
         href={providers.cursor.createUrl(query)}
-        rel="noopener"
+        rel="noopener noreferrer"
         target="_blank"
       >
         <span className="shrink-0">{providers.cursor.icon}</span>
diff --git a/frontend/src/components/ai-elements/sources.tsx b/frontend/src/components/ai-elements/sources.tsx
index f3570f9b2..dd0aa623c 100644
--- a/frontend/src/components/ai-elements/sources.tsx
+++ b/frontend/src/components/ai-elements/sources.tsx
@@ -63,7 +63,7 @@ export const Source = ({ href, title, children, ...props }: SourceProps) => (
   <a
     className="flex items-center gap-2"
     href={href}
-    rel="noreferrer"
+    rel="noopener noreferrer"
     target="_blank"
     {...props}
   >
diff --git a/frontend/src/components/landing/header.tsx b/frontend/src/components/landing/header.tsx
index 7e4afa435..39e40d106 100644
--- a/frontend/src/components/landing/header.tsx
+++ b/frontend/src/components/landing/header.tsx
@@ -8,7 +8,11 @@ export function Header() {
   return (
     <header className="container-md fixed top-0 right-0 left-0 z-20 mx-auto flex h-16 items-center justify-between backdrop-blur-xs">
       <div className="flex items-center gap-2">
-        <a href="https://github.com/bytedance/deer-flow" target="_blank">
+        <a
+          href="https://github.com/bytedance/deer-flow"
+          target="_blank"
+          rel="noopener noreferrer"
+        >
           <h1 className="font-serif text-xl">DeerFlow</h1>
         </a>
       </div>
@@ -26,7 +30,11 @@ export function Header() {
           asChild
           className="group relative z-10"
         >
-          <a href="https://github.com/bytedance/deer-flow" target="_blank">
+          <a
+            href="https://github.com/bytedance/deer-flow"
+            target="_blank"
+            rel="noopener noreferrer"
+          >
             <GitHubLogoIcon className="size-4" />
             Star on GitHub
             {env.NEXT_PUBLIC_STATIC_WEBSITE_ONLY === "true" &&
diff --git a/frontend/src/components/landing/sections/case-study-section.tsx b/frontend/src/components/landing/sections/case-study-section.tsx
index 0ae2f667f..6a7cc4956 100644
--- a/frontend/src/components/landing/sections/case-study-section.tsx
+++ b/frontend/src/components/landing/sections/case-study-section.tsx
@@ -57,6 +57,7 @@ export function CaseStudySection({ className }: { className?: string }) {
             key={caseStudy.title}
             href={pathOfThread(caseStudy.threadId) + "?mock=true"}
             target="_blank"
+            rel="noopener noreferrer"
           >
             <Card className="group/card relative h-64 overflow-hidden">
               <div
diff --git a/frontend/src/components/landing/sections/community-section.tsx b/frontend/src/components/landing/sections/community-section.tsx
index 0b6bf6fca..0582d50ba 100644
--- a/frontend/src/components/landing/sections/community-section.tsx
+++ b/frontend/src/components/landing/sections/community-section.tsx
@@ -20,7 +20,11 @@ export function CommunitySection() {
     >
       <div className="flex justify-center">
         <Button className="text-xl" size="lg" asChild>
-          <Link href="https://github.com/bytedance/deer-flow" target="_blank">
+          <Link
+            href="https://github.com/bytedance/deer-flow"
+            target="_blank"
+            rel="noopener noreferrer"
+          >
             <GitHubLogoIcon />
             Contribute Now
           </Link>
diff --git a/frontend/src/components/workspace/artifacts/artifact-file-detail.tsx b/frontend/src/components/workspace/artifacts/artifact-file-detail.tsx
index 6186138c2..be5e735ea 100644
--- a/frontend/src/components/workspace/artifacts/artifact-file-detail.tsx
+++ b/frontend/src/components/workspace/artifacts/artifact-file-detail.tsx
@@ -188,7 +188,11 @@ export function ArtifactFileDetail({
               </Tooltip>
             )}
             {!isWriteFile && (
-              <a href={urlOfArtifact({ filepath, threadId })} target="_blank">
+              <a
+                href={urlOfArtifact({ filepath, threadId })}
+                target="_blank"
+                rel="noopener noreferrer"
+              >
                 <ArtifactAction
                   icon={SquareArrowOutUpRightIcon}
                   label={t.common.openInNewWindow}
@@ -217,6 +221,7 @@ export function ArtifactFileDetail({
               <a
                 href={urlOfArtifact({ filepath, threadId, download: true })}
                 target="_blank"
+                rel="noopener noreferrer"
               >
                 <ArtifactAction
                   icon={DownloadIcon}
diff --git a/frontend/src/components/workspace/artifacts/artifact-file-list.tsx b/frontend/src/components/workspace/artifacts/artifact-file-list.tsx
index 99b2e3742..b8717c014 100644
--- a/frontend/src/components/workspace/artifacts/artifact-file-list.tsx
+++ b/frontend/src/components/workspace/artifacts/artifact-file-list.tsx
@@ -111,6 +111,7 @@ export function ArtifactFileList({
                   download: true,
                 })}
                 target="_blank"
+                rel="noopener noreferrer"
                 onClick={(e) => e.stopPropagation()}
               >
                 <Button variant="ghost">
diff --git a/frontend/src/components/workspace/messages/message-group.tsx b/frontend/src/components/workspace/messages/message-group.tsx
index b7205f558..f6e10bc6b 100644
--- a/frontend/src/components/workspace/messages/message-group.tsx
+++ b/frontend/src/components/workspace/messages/message-group.tsx
@@ -215,7 +215,7 @@ function ToolCall({
           <ChainOfThoughtSearchResults>
             {result.map((item) => (
               <ChainOfThoughtSearchResult key={item.url}>
-                <a href={item.url} target="_blank" rel="noreferrer">
+                <a href={item.url} target="_blank" rel="noopener noreferrer">
                   {item.title}
                 </a>
               </ChainOfThoughtSearchResult>
@@ -250,7 +250,7 @@ function ToolCall({
                     className="size-24 overflow-hidden rounded-lg object-cover"
                     href={item.source_url}
                     target="_blank"
-                    rel="noreferrer"
+                    rel="noopener noreferrer"
                   >
                     <div className="bg-accent size-24">
                       <img
@@ -289,7 +289,7 @@ function ToolCall({
       >
         <ChainOfThoughtSearchResult>
           {url && (
-            <a href={url} target="_blank" rel="noreferrer">
+            <a href={url} target="_blank" rel="noopener noreferrer">
               {title}
             </a>
           )}