Insertion of Sensitive Information Into Sent Data 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.
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Test your applications- Snyk IDSNYK-JS-BACKSTAGEPLUGINSCAFFOLDERBACKEND-20825245
- published11 Oct 2026
- disclosed7 Oct 2026
- creditUnknown
Introduced: 7 Oct 2026
NewCVE-2026-106501 (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 Insertion of Sensitive Information Into Sent Data via the task serialization logic in router.ts, which previously included secrets and state fields in API responses for task retrieval endpoints. An authenticated attacker can read task secrets - such as credentials or tokens stored in scaffolder task context - by querying the task list or task detail endpoints, as these fields were included in the serialized response without being stripped.