CVE-2026-106499Medium· 4.9▾ SunlitBackstage 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.d…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 27 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 7.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.3%
Last analysed / modified upstream
0.3% → 0.3%
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.
backstage/plugin-scaffolder-backend < 4.1.0backstage < 1.54.6Upgrade past the affected range:
backstage/plugin-scaffolder-backend 4.1.0backstage 1.54.6Affected packages:
@backstage/plugin-scaffolder-backend < 4.1.0Patched in:
@backstage/plugin-scaffolder-backend 4.1.0Source: https://github.com/advisories/GHSA-mfvq-x7vr-rgqg
Connected by shared product, vendor, weakness, or advisory.
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