diff --git a/.changeset/red-lions-unite.md b/.changeset/red-lions-unite.md
new file mode 100644
index 000000000..f40146ab5
--- /dev/null
+++ b/.changeset/red-lions-unite.md
@@ -0,0 +1,5 @@
+---
+'@rspress/theme-default': patch
+---
+
+fix(theme): replace angle brackets in inline markdown
diff --git a/packages/theme-default/src/logic/utils.ts b/packages/theme-default/src/logic/utils.ts
index 3e692af88..7c052fd8b 100644
--- a/packages/theme-default/src/logic/utils.ts
+++ b/packages/theme-default/src/logic/utils.ts
@@ -57,6 +57,7 @@ export function renderHtmlOrText(str?: string | number | null) {
  */
 export function renderInlineMarkdown(text: string) {
   const htmlText = text
+    .replace(/</g, '&lt;')
     .replace(/\*\*(.*?)\*\*/g, '<strong>$1</strong>')
     .replace(/`(.*?)`/g, '<code>$1</code>');
   return renderHtmlOrText(htmlText);