Race Condition Affecting @backstage/plugin-scaffolder-backend package, versions <3.3.1>=3.4.0 <3.4.1>=4.0.0 <4.0.3>=4.0.4 <4.1.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-JS-BACKSTAGEPLUGINSCAFFOLDERBACKEND-20825376
- published11 Oct 2026
- disclosed7 Oct 2026
- creditUnknown
Introduced: 7 Oct 2026
NewCVE-2026-106500 (opens in a new tab)How to fix?
Upgrade @backstage/plugin-scaffolder-backend to version 3.3.1, 3.4.1, 4.0.3, 4.1.0 or higher.
Overview
@backstage/plugin-scaffolder-backend is a The Backstage backend plugin that helps you create new things
Affected versions of this package are vulnerable to Race Condition via the retryTask method in DatabaseTaskStore.ts, where a task retry operation is performed without first validating that the task is in a terminal state. An authenticated attacker can trigger a retry on a task that is currently open or processing, causing the task's status to be reset to open and its event history to be manipulated, potentially leading to unauthorized re-execution of scaffolder tasks with elevated privileges and full confidentiality, integrity, and availability impact on downstream systems.