CVE-2026-106509: backstage < 1.50.5, >= 1.51.0-next.0, < 1.54.6; +1 more affected products

Affected technology

backstage · < 1.50.5, >= 1.51.0-next.0, < 1.54.6
backstage

plugin-techdocs-node · < 1.14.6, >= 1.15.0, < 1.15.4
@backstage

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

The source says 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. Vendor/CNA’s CVSS 3.1 assessment (base score 7.7/10) rates confidentiality impact as high; integrity and availability impact as low.