要点
- CVE-2026-106504 は backstage (linuxfoundation), backstage/plugin-scaffolder-backend (linuxfoundation), @backstage/plugin-scaffolder-backend に影響する深刻度「中」 (CVSS 6.5) の脆弱性です。
- 今後30日間に悪用される確率（EPSS）：0.26%（全脆弱性の 17.4% より高い）。
- 対処：1.54.6, 4.1.0 以降に更新してください。
概要
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
NVD の説明
Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder task logs. 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. This issue is fixed in version 4.1.0.
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