GitHub Advisoryadvisory · npm

GHSA-4xvq-3m68-h444 Backstage has sensitive information exposure in scaffolder task logs

MEDIUM Published 2026-10-07 Modified 2026-10-07 Official page ↗
Aliases
CVE-2026-106504
Ecosystem
npm
Packages
@backstage/plugin-scaffolder-backend
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-532
Reviewed
2026-10-07

Affected packages

• npm @backstage/plugin-scaffolder-backend: < 4.1.0 → fixed in 4.1.0

Description

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 • Backstage threat model • Backstage permissions overview

Related

Alias · CVE (1)

  • CVE-2026-106504 Backstage is an open framework for building developer portals. vulnerability

Weakness · CWE (1)

  • CWE-532 Insertion of Sensitive Information into Log File weakness

References