---
cve: "CVE-2023-35926"
severity: "HIGH"
cvss: 8.1
epss: "1.9%"
vendor: "backstage"
kev: false
exploited: false
published: "2023-06-22 14:15:09"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T11:25:17+02:00"
---

# CVE-2023-35926

> 8.1 HIGH · 🧪 PoC

## Beschreibung

Backstage is an open platform for building developer portals. The Backstage scaffolder-backend plugin uses a templating library that requires 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. 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. This is vulnerability is fixed in version 1.15.0 of `@backstage/plugin-scaffolder-backend`.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Hoch | good |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 07e8526b304368b31280f5fc486f783b61c78e38 (Commit)
- fb7375507d56faedcb7bb3665480070593c8949a (Commit)

## Referenzen

- <https://github.com/backstage/backstage/security/advisories/GHSA-wg6p-jmpc-xjmr>
- <https://github.com/backstage/backstage/commit/fb7375507d56faedcb7bb3665480070593c8949a>
- <https://github.com/backstage/backstage/releases/tag/v1.15.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2023-35926) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_