En bref
- CVE-2026-106500 est une vulnérabilité ÉLEVÉE (CVSS 8.5) touchant backstage (linuxfoundation), backstage/plugin-scaffolder-backend (linuxfoundation), @backstage/plugin-scaffolder-backend.
- Probabilité d'exploitation dans les 30 prochains jours (EPSS) : 0.34%, plus élevée que 27.0% des vulnérabilités.
- Correctif : mettre à jour vers 1.50.5, 1.54.6, 1.49.6, 3.4.1 ou plus récent.
Description
Impact
An authenticated user with permission to create and access Scaffolder tasks may, under specific timing and deployment conditions, affect files accessible to the Backstage backend. If backend application files are writable, the confidentiality, integrity, and availability of the backend may be compromised.
Patches
Patched in @backstage/plugin-scaffolder-backend version 4.1.0
Workarounds
- Restrict Scaffolder task creation and task-read permissions to trusted users through the permission policy.
- Limit who can register or modify templates and which Scaffolder actions may execute.
- Run backend application files read-only outside a dedicated, least-privilege Scaffolder working directory.
References
NVD description
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 improper task state validation in scaffolder backend. An authenticated user with permission to create and access Scaffolder tasks may, under specific timing and deployment conditions, affect files accessible to the Backstage backend. If backend application files are writable, the confidentiality, integrity, and availability of the backend may be compromised. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.
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