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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Vulnerable Products 9
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Linuxfoundation Backstage_Plugin-Techdocs-Node
cpe:2.3:a:linuxfoundation:backstage_plugin-techdocs-node:*:*:*:*:*:*:*:*
|
— |
1.14.6
|
|
Linuxfoundation Backstage_Plugin-Techdocs-Node
cpe:2.3:a:linuxfoundation:backstage_plugin-techdocs-node:*:*:*:*:*:*:*:*
|
1.15.0
|
1.15.4
|
|
Linuxfoundation Backstage
cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*
|
— |
1.50.5
|
|
Linuxfoundation Backstage
cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*
|
1.51.1
|
1.54.6
|
|
Linuxfoundation Backstage
cpe:2.3:a:linuxfoundation:backstage:1.51.0:-:*:*:*:*:*:*
|
— | — |
|
Linuxfoundation Backstage
cpe:2.3:a:linuxfoundation:backstage:1.51.0:next0:*:*:*:*:*:*
|
— | — |
|
Linuxfoundation Backstage
cpe:2.3:a:linuxfoundation:backstage:1.51.0:next1:*:*:*:*:*:*
|
— | — |
|
Linuxfoundation Backstage
cpe:2.3:a:linuxfoundation:backstage:1.51.0:next2:*:*:*:*:*:*
|
— | — |
|
Linuxfoundation Backstage
cpe:2.3:a:linuxfoundation:backstage:1.51.0:next3:*:*:*:*:*:*
|
— | — |
References 5
https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx
https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx
https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b069…
https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9
https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c…
https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db
https://github.com/backstage/backstage/releases/tag/v1.50.5
https://github.com/backstage/backstage/releases/tag/v1.50.5
https://github.com/backstage/backstage/releases/tag/v1.54.6
https://github.com/backstage/backstage/releases/tag/v1.54.6