CVE-2026-106499

Fixed upstream EPSS <1%CVSS 4.9

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.

Published 2026-10-06 · CVE record · OSV

Products: backstage, @backstage plugin-scaffolder-backend

Fixed upstream