Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-106509

Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs theme configuration in techdocs. 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. This issue is fixed in versions 1.14.6 and 1.15.4.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 28.9%
CVSS Severity
CVSS v3 Score 7.7
Products affected by CVE-2026-106509


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