[ CVE-2026-106508 · Published 6 Oct 2026 ]
Backstage has potential file exposure through local TechDocs publisher
CVSS 6.5
EPSS <1%Fix available
[ Description ]Official description
Backstage is an open framework for building developer portals. Prior to 1.15.4, the @backstage/plugin-techdocs-node package is affected by potential file exposure through local techdocs publisher. When using the local TechDocs publisher (techdocs.publisher.type: 'local'), it was possible for the documentation serving endpoint to follow filesystem references outside the intended documentation tree, potentially exposing host files to authenticated users. This is mitigated by the fact that exploration requires preconditions that do not arise through normal MkDocs operation. Cloud-based publishers (S3, GCS, Azure Blob Storage) are not affected. This issue is fixed in version 1.15.4.
[ Fixes ]Fixes and patches
- @backstage/plugin-techdocs-node 1.15.4Fixed version · GitHub Advisories · npm package @backstage/plugin-techdocs-node: upgrade to 1.15.4 or later (affected < 1.15.4)
- Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
- Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
[ Packages ]Affected open-source packages
- @backstage/plugin-techdocs-node npmAffected < 1.15.4 · fixed in 1.15.4 · GHSA-cm77-ch27-6w6v