diff --git a/Lib/mimetypes.py b/Lib/mimetypes.py
index 33e86d51a0fe50..ffaf1b1006cb3b 100644
--- a/Lib/mimetypes.py
+++ b/Lib/mimetypes.py
@@ -722,18 +722,23 @@ def _main(args=None):
 
     args, help_text = _parse_args(args)
 
+    results = []
     if args.extension:
         for gtype in args.type:
             guess = guess_extension(gtype, not args.lenient)
             if guess:
-                return str(guess)
-            sys.exit(f"error: unknown type {gtype}")
+                results.append(str(guess))
+            else:
+                sys.exit(f"error: unknown type {gtype}")
+        return '\n'.join(results)
     else:
         for gtype in args.type:
             guess, encoding = guess_type(gtype, not args.lenient)
             if guess:
-                return f"type: {guess} encoding: {encoding}"
-            sys.exit(f"error: media type unknown for {gtype}")
+                results.append(f"type: {guess} encoding: {encoding}")
+            else:
+                sys.exit(f"error: media type unknown for {gtype}")
+        return '\n'.join(results)
     return help_text
 
 
diff --git a/Misc/NEWS.d/next/Library/2025-07-10-21-02-43.gh-issue-136507.pnEuGS.rst b/Misc/NEWS.d/next/Library/2025-07-10-21-02-43.gh-issue-136507.pnEuGS.rst
new file mode 100644
index 00000000000000..58cc5461b92bfd
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-07-10-21-02-43.gh-issue-136507.pnEuGS.rst
@@ -0,0 +1 @@
+Fix mimetypes CLI cannot handle multiple file parameters