CVE-2026-106556: @backstage Plugin-Techdocs-Node

High severity, CVSS 7.7. EPSS: 0.3% chance of exploitation in the next 30 days.

Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by configuration bypass in techdocs mkdocs.yml sanitization. Insufficient validation of MkDocs configuration during TechDocs generation could allow an authenticated user who can register or modify documentation sources to execute arbitrary commands in the build environment. Impact is limited to resources accessible to the TechDocs backend or build container. This issue is fixed in versions 1.14.6 and 1.15.4.

Affected products

• @backstage Plugin-Techdocs-Node: before 1.14.6 (fixed in 1.14.6); from 1.15.0, before 1.15.4 (fixed in 1.15.4)
• Backstage Backstage: before 1.50.5 (fixed in 1.50.5); from 1.51.0-next.0, before 1.54.6 (fixed in 1.54.6)

Published 2026-10-07. Last modified 2026-10-07.