diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index 48b7c42654..80a64e3338 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -1304,6 +1304,7 @@ async function canClose() {
 
 defineExpose({
 	clear,
+	abortUploader: () => uploader.abortAll(),
 	canClose,
 });
 </script>
diff --git a/packages/frontend/src/components/MkPostFormDialog.vue b/packages/frontend/src/components/MkPostFormDialog.vue
index bf332e706e..ba8d3a7210 100644
--- a/packages/frontend/src/components/MkPostFormDialog.vue
+++ b/packages/frontend/src/components/MkPostFormDialog.vue
@@ -54,6 +54,7 @@ function onPosted() {
 async function _close() {
 	const canClose = await form.value?.canClose();
 	if (!canClose) return;
+	form.value?.abortUploader();
 	modal.value?.close();
 }