CVE-2026-106556
Backstage: Configuration bypass in TechDocs mkdocs.yml sanitization
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, the @backstage/plugin-techdocs-node package is affected by configuration bypass in techdocs mkdocs.yml sanitization. Insufficient validation of MkDocs configuration during TechDocs generation could allow an authenticated user who can register or modify documentation sources to execute arbitrary commands in the build environment. Impact is limited to resources accessible to the TechDocs backend or build container. This issue is fixed in versions 1.14.6 and 1.15.4.
| CWE | CWE-78 CWE-184 |
| Vendor | backstage |
| Product | backstage |
| Published | Oct 7, 2026 |
| Last Updated | Oct 7, 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-g2hj-v2j6-vfvg github.com: https://github.com/backstage/backstage/commit/25125ee727a3de3418a8fa6a9e458cd5b73ecf26 github.com: https://github.com/backstage/backstage/commit/b6d1aea0bef99b8dfec3c8746032474867ba677a github.com: https://github.com/backstage/backstage/releases/tag/v1.50.5 github.com: https://github.com/backstage/backstage/releases/tag/v1.54.6