CVE-2026-106560

Backstage: Improper repository path validation in a Scaffolder backend module

Published Oct 7, 2026 CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Description
Backstage is an open framework for building developer portals. Prior to 0.3.25, the @backstage/plugin-scaffolder-backend-module-confluence-to-markdown package is affected by improper repository path validation in a scaffolder backend module. An authenticated user who can execute an affected template and control its repository file location may cause generated content to be written outside the task workspace, within locations writable by the Backstage backend process. This issue is fixed in version 0.3.25.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-2cmg-v53w-8xfp Backstage: Improper repository path validation in a Scaffolder backend module
History
Type Values Removed Values Added
First Time appeared Linuxfoundation
Linuxfoundation backstage
Linuxfoundation backstage\/plugin-scaffolder-backend-module-confluence-to-markdown
CPEs cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-confluence-to-markdown:*:*:*:*:*:node.js:*:*
Vendors & Products Linuxfoundation
Linuxfoundation backstage
Linuxfoundation backstage\/plugin-scaffolder-backend-module-confluence-to-markdown
Type Values Removed Values Added
First Time appeared Backstage
Backstage backstage
Backstage plugin-scaffolder-backend-module-confluence-to-markdown
Vendors & Products Backstage
Backstage backstage
Backstage plugin-scaffolder-backend-module-confluence-to-markdown
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Backstage is an open framework for building developer portals. Prior to 0.3.25, the @backstage/plugin-scaffolder-backend-module-confluence-to-markdown package is affected by improper repository path validation in a scaffolder backend module. An authenticated user who can execute an affected template and control its repository file location may cause generated content to be written outside the task workspace, within locations writable by the Backstage backend process. This issue is fixed in version 0.3.25.
Title Backstage: Improper repository path validation in a Scaffolder backend module
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L'}