Backstage Scaffolder plugin has insecure sandbox
The Backstage scaffolder-backend plugin uses a templating library that requires a sandbox, as it by design allows for code injection. The library used for this sandbox so far has been vm2, but in light of several past vulnerabilities and existing vulnerabilities that may not have a fix, the plugin has switched to using a different sandbox library.
Impact
A malicious actor with write access to a registered scaffolder template could manipulate the template in a way that allows for remote code execution on the scaffolder-backend instance. This was only exploitable in the template YAML definition itself and not by user input data.
Patches
This is vulnerability is fixed in version 1.15.0 of @backstage/plugin-scaffolder-backend.
Workarounds
Note that the Backstage Threat Model states that scaffolder templates are considered to be a sensitive area that with the recommendation that you control access and perform manual reviews of changes to the scaffolder templates. The exploit is of a nature where it is easily discoverable in manual review.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de npm | @backstage/plugin-scaffolder-backend | < 1.15.0 | 1.15.0 |
Referencias
- https://github.com/backstage/backstage/security/advisories/GHSA-wg6p-jmpc-xjmr
- https://nvd.nist.gov/vuln/detail/CVE-2023-35926
- https://github.com/backstage/backstage/commit/fb7375507d56faedcb7bb3665480070593c8949a
- https://github.com/backstage/backstage
- https://github.com/backstage/backstage/releases/tag/v1.15.0
- Vector CVSS
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H- Debilidad (CWE)
CWE-94- Plataforma
- npm
- Paquete
@backstage/plugin-scaffolder-backend- Publicada
- 21.06.2023
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-wg6p-jmpc-xjmr - CC BY 4.0
Historial de vulnerabilidades: @backstage/plugin-scaffolder-backend
Todas las vulnerabilidades publicadas de este paquete (Paquete de npm), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 17
- Primera → última
- 10.2021 10.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 1
- Alta 6
- Media 8
- Baja 2
Divulgaciones por año
- 2021: 3
- 2022: 0
- 2023: 1
- 2024: 0
- 2025: 1
- 2026: 12
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Backstage Scaffolder plugin has insecure sandbox esta entrada
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