Backstage has sensitive information exposure in scaffolder task logs
Impact
An authenticated user who can create and read scaffolder tasks may be able to observe sensitive values in task logs in deployments with restrictive action permissions and affected templates. Exploitation requires a denied action whose input contains such a value.
Patches
Patched in @backstage/plugin-scaffolder-backend version 4.1.0
Workarounds
- Restrict scaffolder task creation and task-log reading to trusted users.
- Avoid placing centrally managed sensitive values in inputs to actions that may be denied until upgrading.
References
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @backstage/plugin-scaffolder-backend | < 4.1.0 | 4.1.0 |
References
- https://github.com/backstage/backstage/security/advisories/GHSA-4xvq-3m68-h444
- https://nvd.nist.gov/vuln/detail/CVE-2026-106504
- https://github.com/backstage/backstage/commit/3eb3dc59eb0da0deccd532f19eb460bb452c9efb
- https://github.com/backstage/backstage
- https://github.com/backstage/backstage/releases/tag/v1.54.6
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-532- Platform
- npm
- Package
@backstage/plugin-scaffolder-backend- Disclosed
- 07.10.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-4xvq-3m68-h444 - CC BY 4.0
Vulnerability history: @backstage/plugin-scaffolder-backend
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 17
- First → latest
- 10.2021 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 6
- Medium 8
- Low 2
Disclosures per year
- 2021: 3
- 2022: 0
- 2023: 1
- 2024: 0
- 2025: 1
- 2026: 12
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Backstage has sensitive information exposure in scaffolder task logs this entry
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