diff --git a/.changeset/six-meals-lie.md b/.changeset/six-meals-lie.md
new file mode 100644
index 0000000000..69f6b4c99e
--- /dev/null
+++ b/.changeset/six-meals-lie.md
@@ -0,0 +1,8 @@
+---
+"@comet/cms-admin": patch
+---
+
+Fix link target validation in `ExternalLinkBlock`
+
+Previously, two different validation checks were used.
+This resulted in an error when saving an invalid link target but no error message was shown.
diff --git a/packages/admin/cms-admin/src/blocks/ExternalLinkBlock.tsx b/packages/admin/cms-admin/src/blocks/ExternalLinkBlock.tsx
index df14ba3fa2..71b16f2c93 100644
--- a/packages/admin/cms-admin/src/blocks/ExternalLinkBlock.tsx
+++ b/packages/admin/cms-admin/src/blocks/ExternalLinkBlock.tsx
@@ -6,7 +6,7 @@ import { FormattedMessage } from "react-intl";
 
 import { ExternalLinkBlockData, ExternalLinkBlockInput } from "../blocks.generated";
 import { isLinkTarget } from "../validation/isLinkTarget";
-import { validateUrl } from "../validation/validateUrl";
+import { validateLinkTarget } from "../validation/validateLinkTarget";
 
 type State = ExternalLinkBlockData;
 
@@ -68,7 +68,7 @@ export const ExternalLinkBlock: BlockInterface<ExternalLinkBlockData, State, Ext
                         name="targetUrl"
                         component={FinalFormInput}
                         fullWidth
-                        validate={(url) => validateUrl(url)}
+                        validate={(url) => validateLinkTarget(url)}
                         disableContentTranslation
                     />
                     <Field name="openInNewWindow" type="checkbox">
diff --git a/packages/admin/cms-admin/src/validation/validateLinkTarget.tsx b/packages/admin/cms-admin/src/validation/validateLinkTarget.tsx
new file mode 100644
index 0000000000..a6a702762f
--- /dev/null
+++ b/packages/admin/cms-admin/src/validation/validateLinkTarget.tsx
@@ -0,0 +1,10 @@
+import React from "react";
+import { FormattedMessage } from "react-intl";
+
+import { isLinkTarget } from "./isLinkTarget";
+
+export function validateLinkTarget(linkTarget: string) {
+    if (!isLinkTarget(linkTarget)) {
+        return <FormattedMessage id="comet.validation.validateLinkTarget.invalid" defaultMessage="Invalid link target" />;
+    }
+}