CVE-2026-106501
Backstage: Sensitive information exposure in Scaffolder
An authenticated Backstage user who can read another user's Scaffolder task may receive internal execution data. In deployments where that data contains credentials for an external service, this may permit disclosure and unauthorized changes in that external service.
- No known exploitation
- Severity
- Critical, CVSS 9.6 (v3.1)
- EPSS
- 0.48% chance of exploitation in 30 days (EPSS, as of Oct 23, 2026)
- Affected packages
- @backstage/plugin-scaffolder-backend (npm) < 3.3.1, fixed in 3.3.1 · GHSA-g2v8-7jhw-pp8p
- @backstage/plugin-scaffolder-backend (npm) >= 3.4.0, < 3.4.1, fixed in 3.4.1 · GHSA-g2v8-7jhw-pp8p
- @backstage/plugin-scaffolder-backend (npm) >= 4.0.0, < 4.0.3, fixed in 4.0.3 · GHSA-g2v8-7jhw-pp8p
- @backstage/plugin-scaffolder-backend (npm) >= 4.0.4, < 4.1.0, fixed in 4.1.0 · GHSA-g2v8-7jhw-pp8p