---
id: CVE-2026-106486
title: Backstage is an open framework for building developer portals
summary: >-
  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-…
severity: high
cvss: 8.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-22
  - CWE-59
vendor: backstage
product: backstage
affected:
  - backstage < 1.54.6
  - plugin-scaffolder-backend-module-bitbucket-cloud < 0.3.10
  - plugin-scaffolder-backend-module-bitbucket-server < 0.2.25
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T21:17:17.323'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106486'
references:
  - url: >-
      https://github.com/backstage/backstage/commit/818528e112c36167d76187e9e63fb518399c4dd2
    label: security-advisories@github.com
  - url: 'https://github.com/backstage/backstage/releases/tag/v1.54.6'
    label: security-advisories@github.com
  - url: >-
      https://github.com/backstage/backstage/security/advisories/GHSA-g8rx-f7m5-7794
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-06T21:20:28.983Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.