CVE-2026-106557
Description
Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package did not sufficiently validate TechDocs Markdown extension configuration. An authenticated user who can register or modify documentation sources may cause a TechDocs build to access resources outside the intended documentation boundary, potentially exposing backend-host data or internal network resources. This issue is fixed in versions 1.14.6 and 1.15.4 when pymdown-extensions 10.21.3 or later is also used, normally through mkdocs-techdocs-core 1.7.0 or later.
How to fix
- @backstage/plugin-techdocs-node1.15.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @backstage/plugin-techdocs-nodenpm | v < 1.15.4 | 1.15.4 |
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