Backstage up to 1.26.0 Cloud Storage Catalog Providers path traversal

Summaryinfo

A vulnerability identified as problematic has been detected in Backstage. This affects an unknown function of the component Cloud Storage Catalog Providers. Performing a manipulation results in path traversal. This vulnerability is known as CVE-2026-106493. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Backstage. This affects some unknown functionality of the component Cloud Storage Catalog Providers. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality. The summary by CVE is:

Backstage is an open framework for building developer portals. Prior to 1.54.6, cloud storage catalog providers did not sufficiently validate object paths. A principal able to create or rename objects in a configured Azure Blob Storage or AWS S3 catalog source could cause catalog descriptors to be read from outside the intended storage boundary, limited to locations reachable with the backend's configured credentials. This issue is fixed in 1.54.6.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-106493 since 10/06/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 1.54.6 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-94013). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• Backstage

Version

• 0.1.17
• 0.3.75
• 0.4.9
• 0.4.12
• 0.5.0
• 0.5.15
• 0.6.0
• 0.6.3
• 0.6.4
• 0.6.15
• 0.6.18
• 0.7.4
• 0.7.5
• 0.8.7
• 0.12.2
• 0.13.1
• 0.13.2
• 0.14.0
• 0.14.1
• 0.15.9
• 0.15.14
• 0.27.1
• 0.29.2
• 1.10.13
• 1.13.11
• 1.14.0
• 1.14.3
• 1.14.6
• 1.14.7
• 1.15.3
• 1.15.4
• 1.15.5
• 1.20.1
• 1.26.0

Website

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

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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