Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') Affecting @backstage/plugin-techdocs-node package, versions <1.14.6>=1.15.0 <1.15.4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-BACKSTAGEPLUGINTECHDOCSNODE-20825498
- published11 Oct 2026
- disclosed7 Oct 2026
- creditUnknown
Introduced: 7 Oct 2026
NewCVE-2026-106510 (opens in a new tab)How to fix?
Upgrade @backstage/plugin-techdocs-node to version 1.14.6, 1.15.4 or higher.
Overview
@backstage/plugin-techdocs-node is a Common node.js functionalities for TechDocs, to be shared between techdocs-backend plugin and techdocs-cli
Affected versions of this package are vulnerable to Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') via insufficient sanitization of markdown_extensions entries in mkdocsPatchers.ts during TechDocs site generation. An attacker who controls a repository's mkdocs.yml file can inject arbitrary Python module references (e.g., subprocess:Popen or os:system) as extension names, or supply a malicious plantuml_cmd value under the plantuml_markdown extension, causing the MkDocs build process to execute attacker-controlled OS commands on the TechDocs generator host.