Permissive List of Allowed Inputs Affecting @backstage/plugin-techdocs-node package, versions >=1.13.11 <1.14.3
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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- published5 Mar 2026
- disclosed5 Mar 2026
- creditUnknown
Introduced: 5 Mar 2026
CVE-2026-29186 (opens in a new tab)How to fix?
Upgrade @backstage/plugin-techdocs-node to version 1.14.3 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 Permissive List of Allowed Inputs via the processing of the mkdocs.yml configuration file during the documentation build process. An attacker can execute arbitrary Python code by crafting a malicious configuration file that bypasses security controls through unfiltered configuration keys.
Workaround
This vulnerability can be mitigated by configuring the system to use Docker mode with restricted access, limiting modification permissions for configuration files to trusted contributors, or downgrading to a version of MkDocs < 1.4.0 which does not support hooks.