CVE-2026-106509
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs theme configuration in techdocs. When TechDocs is configured to build documentation locally or in a container, a user with write access to a registered repository can include configuration values in mkdocs.yml that cause arbitrary code execution during the documentation build process. This issue is fixed in versions 1.14.6 and 1.15.4.
- Score
- CVSS 3.1 8.8 High
- Status
- Analyzed - security-advisories@github.com
- Published
- 2026-10-06
- Last modified
- 2026-10-09
- Weaknesses
- CWE-1336, CWE-94
Affected products
- Backstage (Backstage)
- Plugin-techdocs-node (Backstage)
- Backstage (Linuxfoundation)
- Backstage Plugin-techdocs-node (Linuxfoundation)
References
- https://github.com/backstage/backstage/security/advisories/GHSA-8w7q-29mw-gf5c
- https://github.com/backstage/backstage/commit/02cd7cdbb18b687446277b5602adaee7f1d53cbb
- https://github.com/backstage/backstage/commit/a900a9953c8f7ad3ba1906d1d257725a9996cc9d
- https://github.com/backstage/backstage/releases/tag/v1.50.5
- https://github.com/backstage/backstage/releases/tag/v1.54.6
