CVE-2026-106503High· 8.1▾ TwilightBackstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by scaffolder action input authorization bypass. An authenticated user wi…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 44.6 · 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 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.4%
Last analysed / modified upstream
0.4% → 0.4%
Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by scaffolder action input authorization bypass. An authenticated user with access to affected Scaffolder templates could bypass configured action restrictions. Depending on integration credentials, this could grant unauthorized access to repositories and related source-control resources. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.
backstage/plugin-scaffolder-backend < 3.3.1backstage/plugin-scaffolder-backend >= 3.4.0, < 3.4.1backstage/plugin-scaffolder-backend >= 4.0.0, < 4.0.3backstage/plugin-scaffolder-backend >= 4.0.4, < 4.1.0backstage < 1.49.6backstage >= 1.50.0, < 1.50.5backstage >= 1.51.0, < 1.54.6Upgrade past the affected range:
backstage/plugin-scaffolder-backend 4.1.0backstage 1.54.6Affected packages:
@backstage/plugin-scaffolder-backend < 3.3.1@backstage/plugin-scaffolder-backend >= 3.4.0, < 3.4.1@backstage/plugin-scaffolder-backend >= 4.0.0, < 4.0.3@backstage/plugin-scaffolder-backend >= 4.0.4, < 4.1.0Patched in:
@backstage/plugin-scaffolder-backend 3.3.1@backstage/plugin-scaffolder-backend 3.4.1@backstage/plugin-scaffolder-backend 4.0.3@backstage/plugin-scaffolder-backend 4.1.0Source: https://github.com/advisories/GHSA-hmp2-4m7g-22cv
Connected by shared product, vendor, weakness, or advisory.
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