CVE-2026-106506
Medium
Description
Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by improper input validation in scaffolder task list ordering. An authenticated Backstage user with permission to create and read relevant scaffolder tasks may be able to infer confidential task data under specific conditions. Successful exploitation requires retained task secrets, visibility of a target task, knowledge of the secret structure, and repeated requests. This issue is fixed in version 4.1.0.
SeverityMedium
CVSS5.3
Exploit probability12. percentile0.2%
Product
Linuxfoundation Backstage
PublishedOct 6, 2026
First seenOct 6, 2026
Weakness typeCWE-202CWE-202CWE-203CWE-203
How to fix
Update
- linuxfoundation backstage1.54.6 or later
- linuxfoundation backstage\/plugin-scaffolder-backend4.1.0 or later
- @backstage/plugin-scaffolder-backend4.1.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linuxfoundation backstage | v < 1.54.6 | 1.54.6 |
| linuxfoundation backstage\/plugin-scaffolder-backend | v < 4.1.0 | 4.1.0 |
| @backstage/plugin-scaffolder-backendnpm | v < 4.1.0 | 4.1.0 |
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