CVE-2026-106505
Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend
CVSS Score
7.7
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-426 CWE-436 |
| Vendor | backstage |
| Product | backstage |
| Published | Oct 6, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
Low
Affected Versions
backstage / backstage
< 1.50.5 >= 1.51.0-next.0, < 1.54.6
@backstage / plugin-techdocs-node
< 1.14.6 >= 1.15.0, < 1.15.4
References
github.com: https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx github.com: https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9 github.com: https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db github.com: https://github.com/backstage/backstage/releases/tag/v1.50.5 github.com: https://github.com/backstage/backstage/releases/tag/v1.54.6