Backstage up to 1.15.3 TechDocs path traversal

Summaryinfo

A vulnerability classified as problematic was found in Backstage up to 1.15.3. The impacted element is an unknown function of the component TechDocs. Such manipulation leads to path traversal. This vulnerability is documented as CVE-2026-106507. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Backstage up to 1.15.3 and classified as problematic. Affected by this issue is an unknown function of the component TechDocs. 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 techdocs arbitrary file read via mkdocs snippets. Unsafe path resolution in TechDocs source tree handling allows an authenticated user who can register documentation sources to include content from outside the intended documentation boundary. Depending on deployment, this may expose files readable by the build process. This issue is fixed in version 1.15.4.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-106507 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.

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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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