| Package | Affected versions | Patched versions |
|---|---|---|
| backstage | = 1.51.0≥ 0.71.1, < 1.50.6≥ 1.51.1, < 1.54.8 | 1.50.61.54.8 |
| backstage plugin-techdocs-node | ≥ 0.11.12, < 1.14.7≥ 1.15.0, < 1.15.5 | 1.14.71.15.5 |
| @backstage/plugin-techdocs-node | ≥ 0.11.12, < 1.14.7≥ 1.15.0, < 1.15.5 | 1.14.71.15.5 |
An authenticated attacker with control over a TechDocs source repository could cause a documentation build to retrieve and publish data from network locations reachable by the build environment. Exposure depends on deployment topology, build mode, and target endpoint protections. Modern cloud metadata services that require tokens or special headers are not directly accessible through the affected behavior.
Upgrade @backstage/plugin-techdocs-node to a patched version for the applicable release line:
1.14.x: upgrade to 1.14.7 or later in that line, available in Backstage v1.50.6.1.15.x: upgrade to 1.15.5 or later, available in Backstage v1.54.8.2.0.0 or later, available in Backstage v1.55.0.The update removes MkDocs plugins outside the built-in allowlist. To retain additional plugins, review them and configure techdocs.generator.mkdocs.dangerouslyAllowAdditionalPlugins, or supply dangerouslyAllowAdditionalPlugins when creating the generator directly. Plugins supplied through defaultPlugins remain permitted.
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