Path Traversal in @Backstage Plugin-Scaffolder-Backend-Module-Confluence-To-Markdown
CVE-2026-106559
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- @Backstage Plugin-Scaffolder-Backend-Module-Confluence-To-Markdown — versions < 0.3.25
- Backstage — versions < 1.54.6
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-106559?
- CVE-2026-106559 is a medium-severity vulnerability in @Backstage Plugin-Scaffolder-Backend-Module-Confluence-To-Markdown, classified under Path Traversal. CVSS score: 6.3/10. Published 2026-10-07.
- How severe is CVE-2026-106559?
- Medium severity. CVSS v3 base score is 6.3 out of 10.