Backstage: Improper input validation in Confluence to Markdown scaffolder module
Impact
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.
Patches
Patched in @backstage/plugin-scaffolder-backend-module-confluence-to-markdown version 0.3.25
Workarounds
If unable to update immediately:
- Restrict Confluence edit access to trusted users.
- Review Confluence page content before running scaffolder templates against untrusted pages.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @backstage/plugin-scaffolder-backend-module-confluence-to-markdown | < 0.3.25 | 0.3.25 |
References
- https://github.com/backstage/backstage/security/advisories/GHSA-75qf-886x-5xf2
- https://nvd.nist.gov/vuln/detail/CVE-2026-106559
- https://github.com/backstage/backstage/commit/506c2c11bce3ed9d1f8f50de5d6474b16e43a65e
- https://github.com/backstage/backstage
- https://github.com/backstage/backstage/releases/tag/v1.54.6
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L- Weakness (CWE)
CWE-22, CWE-73- Platform
- npm
- Package
@backstage/plugin-scaffolder-backend-module-confluence-to-markdown- Disclosed
- 07.10.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-75qf-886x-5xf2 - CC BY 4.0
Vulnerability history: @backstage/plugin-scaffolder-backend-module-confluence-to-markdown
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 10.2026 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 1
Disclosures per year
- 2026: 2
-
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