CVE-2026-106501
Received
Received - Intake
Sensitive Information Exposure in Backstage Scaffolder
Vulnerability report for CVE-2026-106501, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-06
Last updated on: 2026-10-06
Assigner: GitHub, Inc.
Description
Description
Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder. An authenticated Backstage user who can read another user's Scaffolder task may receive internal execution data. In deployments where that data contains credentials for an external service, this may permit disclosure and unauthorized changes in that external service. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| backstage | backstage | < 1.49.6 |
| backstage | backstage | >= 1.50.0-next.0, < 1.50.5 |
| backstage | backstage | >= 1.51.0-next.0, < 1.54.6 |
| @backstage | plugin-scaffolder-backend | < 3.3.1 |
| @backstage | plugin-scaffolder-backend | >= 3.4.0, < 3.4.1 |
| @backstage | plugin-scaffolder-backend | >= 4.0.0, < 4.0.3 |
| @backstage | plugin-scaffolder-backend | >= 4.0.4, < 4.1.0 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-201 | The code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor. |
| CWE-200 | The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. |
