Backstage up to 1.15.3 plugin-techdocs-node path traversal

Summaryinfo

A vulnerability described as problematic has been identified in Backstage up to 1.15.3. This affects an unknown function of the component plugin-techdocs-node. Such manipulation leads to path traversal. This vulnerability is listed as CVE-2026-106508. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Backstage up to 1.15.3. It has been rated as problematic. Affected by this issue is an unknown code block of the component plugin-techdocs-node. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality. CVE summarizes:

Backstage is an open framework for building developer portals. Prior to 1.15.4, the @backstage/plugin-techdocs-node package is affected by potential file exposure through local techdocs publisher. When using the local TechDocs publisher (techdocs.publisher.type: 'local'), it was possible for the documentation serving endpoint to follow filesystem references outside the intended documentation tree, potentially exposing host files to authenticated users. This is mitigated by the fact that exploration requires preconditions that do not arise through normal MkDocs operation. Cloud-based publishers (S3, GCS, Azure Blob Storage) are not affected. This issue is fixed in version 1.15.4.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-106508 since 10/06/2026. The exploitation is known to be easy. The attack may be launched remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 1.15.4 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• Backstage

Version

• 1.15.0
• 1.15.1
• 1.15.2
• 1.15.3

Website

• Product: https://github.com/backstage/backstage/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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