---
cve: "CVE-2026-106486"
severity: "HIGH"
cvss: 8.5
epss: "0.3%"
vendor: "@backstage"
kev: false
exploited: false
published: "2026-10-06 21:17:17"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-08T14:04:45+02:00"
---

# CVE-2026-106486

> 8.5 HIGH · 🧪 PoC

## Beschreibung

Backstage is an open framework for building developer portals. Prior to 0.3.10 in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud and 0.2.25 in @backstage/plugin-scaffolder-backend-module-bitbucket-server, the Bitbucket pull-request Scaffolder actions did not sufficiently validate filesystem paths. An authenticated user who can execute an eligible template and influence an allowed Bitbucket repository could affect paths outside the expected working area, potentially compromising backend confidentiality, integrity, or availability. This issue is fixed in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud 0.3.10 and @backstage/plugin-scaffolder-backend-module-bitbucket-server 0.2.25.

## CNA-Record (Kanon, cvelistV5)

- CNA: **GitHub_M**
- State: PUBLISHED
- Stand: 2026-10-07 16:22:11
- CNA-CVSS: **8.5** (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 818528e112c36167d76187e9e63fb518399c4dd2 (Commit)
- 0e67bc1fc88fba3a8cb716d3584cef05ecbcf9a8 (Commit)

## Referenzen

- <https://github.com/backstage/backstage/security/advisories/GHSA-g8rx-f7m5-7794>
- <https://github.com/backstage/backstage/commit/818528e112c36167d76187e9e63fb518399c4dd2>
- <https://github.com/backstage/backstage/releases/tag/v1.54.6>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-106486/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_