diff --git a/.changeset/rude-mayflies-heal.md b/.changeset/rude-mayflies-heal.md
new file mode 100644
index 0000000000..01cbf01e28
--- /dev/null
+++ b/.changeset/rude-mayflies-heal.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-vault-backend': patch
+---
+
+Added `errorHandler()` middleware to `router` to prevent crashes caused by fatal errors in plugin backend
diff --git a/plugins/vault-backend/src/service/VaultBuilder.ts b/plugins/vault-backend/src/service/VaultBuilder.ts
index 67260f45ca..b82a5802bb 100644
--- a/plugins/vault-backend/src/service/VaultBuilder.ts
+++ b/plugins/vault-backend/src/service/VaultBuilder.ts
@@ -20,6 +20,7 @@ import { Logger } from 'winston';
 import express, { Router } from 'express';
 import { VaultClient } from './vaultApi';
 import { TaskRunner, PluginTaskScheduler } from '@backstage/backend-tasks';
+import { errorHandler } from '@backstage/backend-common';
 
 /**
  * Environment values needed by the VaultBuilder
@@ -145,6 +146,7 @@ export class VaultBuilder {
       res.json({ items: secrets });
     });
 
+    router.use(errorHandler());
     return router;
   }
 }