CVE-2026-106505
CVE-2026-106505 · Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package is affected by bypass of mkdocs configuration sanitizer in techdocs backend. Users with the ability to commit changes to a repository that uses TechDocs can circumvent the MkDocs configuration file sanitizer introduced in response to CVE-2026-25153 and execute arbitrary code on the TechDocs backend host during documentation generation. This issue is fixed in versions 1.14.6 and 1.15.4.
CVSS 7.7 · High · EPSS 0.3% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
backstage
- Versions
- < 1.50.5: Affected
- >= 1.51.0-next.0, < 1.54.6: Affected
No fix published
plugin-techdocs-node
- Versions
- < 1.14.6: Affected
- >= 1.15.0, < 1.15.4: Affected
No fix published
@backstage/plugin-techdocs-node npm
- Affected ranges
- SEMVER: < 1.15.4
Update to 1.15.4
Original sources
- https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx
- https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9
- https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db
- https://github.com/backstage/backstage/releases/tag/v1.50.5
- https://github.com/backstage/backstage/releases/tag/v1.54.6
- https://nvd.nist.gov/vuln/detail/CVE-2026-106505