diff --git a/frontend/src/lib/utils/docMarkdown.ts b/frontend/src/lib/utils/docMarkdown.ts
index 9af6d30..cbf7173 100644
--- a/frontend/src/lib/utils/docMarkdown.ts
+++ b/frontend/src/lib/utils/docMarkdown.ts
@@ -65,6 +65,19 @@ docMarked.use({
         `</figure>`
       );
     },
+    // 외부 링크(http/https) → 새 탭 + rel=noopener noreferrer (탭내빙 차단). 521건 실재.
+    // 내부/프래그먼트/상대 링크는 손대지 않음 — `#` anchor 는 gfmHeadingId/outline 경로 유지
+    // (클릭 인터셉터 없음 → 충돌 0), 상대 .md(코퍼스 0건)는 기본 동작(inert). marked 15 토큰객체 시그니처.
+    link(token: any): string {
+      const href = (token?.href ?? '') as string;
+      const text = this.parser.parseInline(token?.tokens ?? []);
+      const titleAttr = token?.title ? ` title="${escAttr(token.title as string)}"` : '';
+      const safeHref = escAttr(href);
+      if (/^https?:\/\//i.test(href)) {
+        return `<a href="${safeHref}"${titleAttr} target="_blank" rel="noopener noreferrer">${text}</a>`;
+      }
+      return `<a href="${safeHref}"${titleAttr}>${text}</a>`;
+    },
   },
 });
 
@@ -82,6 +95,8 @@ const SANITIZE_OPTS = {
     'data-md-image-internal',
     'data-md-image-alt',
     'loading',
+    'target',
+    'rel',
   ],
   ADD_TAGS: ['figure', 'figcaption'],
   FORBID_TAGS: ['script', 'iframe', 'object', 'embed', 'link', 'meta'],