CVE-2026-106507: Linuxfoundation Backstage

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Backstage is an open framework for building developer portals. Prior to 1.15.4, the @backstage/plugin-techdocs-node package is affected by techdocs arbitrary file read via mkdocs snippets. Unsafe path resolution in TechDocs source tree handling allows an authenticated user who can register documentation sources to include content from outside the intended documentation boundary. Depending on deployment, this may expose files readable by the build process. This issue is fixed in version 1.15.4.

Affected products

• Linuxfoundation Backstage: before 1.54.6 (fixed in 1.54.6)
• Linuxfoundation Backstage Plugin-Techdocs-Node: before 1.15.4 (fixed in 1.15.4)

Published 2026-10-06. Last modified 2026-10-09.