CVE-2026-106559

Backstage: Improper input validation in Confluence to Markdown scaffolder module

Published Oct 7, 2026 CVSS 3.1 · 6.3 Medium 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 input validation in confluence to markdown scaffolder module. Insufficient input validation in the Confluence to Markdown scaffolder module could allow an attacker to influence file write operations during template execution. Exploitation requires a Backstage user to run a template that processes attacker-influenced Confluence content. 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-75qf-886x-5xf2 Backstage: Improper input validation in Confluence to Markdown scaffolder 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 input validation in confluence to markdown scaffolder module. Insufficient input validation in the Confluence to Markdown scaffolder module could allow an attacker to influence file write operations during template execution. Exploitation requires a Backstage user to run a template that processes attacker-influenced Confluence content. This issue is fixed in version 0.3.25.
Title Backstage: Improper input validation in Confluence to Markdown scaffolder module
Weaknesses CWE-22
CWE-73
References
Metrics cvssV3_1

{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L'}