CVE-2026-29184: Linuxfoundation Backstage/plugin-Scaffolder-Backend

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Backstage is an open framework for building developer portals. Prior to version 3.1.4, a malicious scaffolder template can bypass the log redaction mechanism to exfiltrate secrets provided run through task event logs. This issue has been patched in version 3.1.4.

Affected products

• Linuxfoundation Backstage/plugin-Scaffolder-Backend: before 3.1.4 (fixed in 3.1.4)

Published 2026-03-07. Last modified 2026-06-17.