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GHSA-xvh9-35w9-42m4

Backstage: Cloud storage catalog locations may cross configured storage boundaries

Source: GitHub Advisory Database (reviewed) Low CVE-2026-106493

Packages

EcosystemPackageAffectedFixed in
npm @backstage/plugin-catalog-backend-module-azure < 0.3.21 0.3.21
npm @backstage/plugin-catalog-backend-module-aws < 0.4.27 0.4.27
npm @backstage/backend-defaults < 0.17.8 0.17.8

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact Catalog entity providers for Azure Blob Storage and AWS S3 did not sufficiently validate storage object paths, which could allow catalog descriptors to be read from outside the intended storage boundary. Access is limited to locations reachable by the backend's configured credentials. ### Patches - `@backstage/plugin-catalog-backend-module-azure` version `0.3.21` - `@backstage/plugin-catalog-backend-module-aws` version `0.4.27` - `@backstage/backend-defaults` version `0.7.18` ### Workarounds - Restrict blob and object creation or renaming in configured catalog storage sources to trusted principals. - Scope Backstage's Azure and AWS reader credentials and network access to the intended storage boundaries. - Disable an affected catalog provider if those restrictions cannot be enforced.

References

External links from the advisory. They lead to third-party sites.