diff --git a/packages/backend/src/queue/processors/ImportCustomEmojisProcessorService.ts b/packages/backend/src/queue/processors/ImportCustomEmojisProcessorService.ts
index ed96e9a525..cf78d8330c 100644
--- a/packages/backend/src/queue/processors/ImportCustomEmojisProcessorService.ts
+++ b/packages/backend/src/queue/processors/ImportCustomEmojisProcessorService.ts
@@ -86,6 +86,10 @@ export class ImportCustomEmojisProcessorService {
 					continue;
 				}
 				const emojiInfo = record.emoji;
+				if (!/^[a-zA-Z0-9_]+$/.test(emojiInfo.name)) {
+					this.logger.error(`invalid emojiname: ${emojiInfo.name}`);
+					continue;
+				}
 				const emojiPath = outputPath + '/' + record.fileName;
 				await this.emojisRepository.delete({
 					name: emojiInfo.name,