CVE-2026-106499
Backstage: Secret-derived values may be exposed in scaffolder task logs
- State
- Published
- Severity
- 4.9 Medium
- Published
- Oct 6, 2026
- Updated
- Oct 7, 2026
- Reserved
- Oct 6, 2026
Description
Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package could expose secret-derived values in Scaffolder task logs. Deployments that configure sensitive scaffolder.defaultEnvironment.secrets and allow an attacker to create or modify Scaffolder templates are affected. A template author could cause secret-derived values used during template iteration to be persisted and exposed to users who can access the resulting task logs. This issue is fixed in version 4.1.0.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.9 Medium | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N | GitHub_M |
Weaknesses
- CWE-532 Insertion of Sensitive Information into Log File
Affected Products
| Product | Versions |
|---|---|
backstagebackstage |
|
plugin-scaffolder-backend@backstage |
|
References
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