CVE-2026-106505
Received
Received - Intake
Code Execution Bypass in Backstage TechDocs Node
Vulnerability report for CVE-2026-106505, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-06
Last updated on: 2026-10-06
Assigner: GitHub, Inc.
Description
Description
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 Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| backstage | backstage | < 1.50.5 |
| backstage | backstage | >= 1.51.0-next.0, < 1.54.6 |
| @backstage | plugin-techdocs-node | < 1.14.6 |
| @backstage | plugin-techdocs-node | >= 1.15.0, < 1.15.4 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-436 | Product A handles inputs or steps differently than Product B, which causes A to perform incorrect actions based on its perception of B's state. |
| CWE-426 | The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control. |
