# CVE-2026-106493: Backstage: Cloud storage catalog locations may cross configured storage boundaries

Source: https://junglewise.ai/threats/cve-2026-106493-backstage-is-an-open-framework-for-building-developer-portals  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-06  
License: CC BY 4.0 with a link back

CVE-2026-106493 · Severity: low · CVSS 3.1 · Published 2026-10-06

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.

Technologies: [@backstage/backend-defaults (npm)](https://junglewise.ai/threats/technologies/backstage-backend-defaults). Vendors: [npm](https://junglewise.ai/threats/vendors/npm).

## Quick answers

**Is CVE-2026-106493 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-106493 being exploited in the wild.

**How severe is CVE-2026-106493?** Low severity, with a CVSS score of 3.1, published 6 October 2026.

**Which products and versions are affected?** @backstage/backend-defaults (npm) < 0.17.8, SEMVER:introduced=0,fixed=0.17.8; @backstage/plugin-catalog-backend-module-aws (npm) < 0.4.27, SEMVER:introduced=0,fixed=0.4.27; @backstage/plugin-catalog-backend-module-azure (npm) < 0.3.21, SEMVER:introduced=0,fixed=0.3.21.

**Is there a fix for CVE-2026-106493?** Yes. @backstage/backend-defaults (npm): upgrade to 0.17.8 or later; @backstage/plugin-catalog-backend-module-aws (npm): upgrade to 0.4.27 or later; @backstage/plugin-catalog-backend-module-azure (npm): upgrade to 0.3.21 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-106493?** Check whether you run @backstage/backend-defaults (npm), @backstage/plugin-catalog-backend-module-aws (npm) or @backstage/plugin-catalog-backend-module-azure (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- @backstage/backend-defaults (npm): upgrade to 0.17.8 or later

  ```sh
  npm install @backstage/backend-defaults@0.17.8
  ```

- @backstage/plugin-catalog-backend-module-aws (npm): upgrade to 0.4.27 or later

  ```sh
  npm install @backstage/plugin-catalog-backend-module-aws@0.4.27
  ```

- @backstage/plugin-catalog-backend-module-azure (npm): upgrade to 0.3.21 or later

  ```sh
  npm install @backstage/plugin-catalog-backend-module-azure@0.3.21
  ```


## Affected products

- @backstage/backend-defaults (npm) < 0.17.8, SEMVER:introduced=0,fixed=0.17.8
- @backstage/plugin-catalog-backend-module-aws (npm) < 0.4.27, SEMVER:introduced=0,fixed=0.4.27
- @backstage/plugin-catalog-backend-module-azure (npm) < 0.3.21, SEMVER:introduced=0,fixed=0.3.21

## Identifiers

- CVE-2026-106493
- GHSA-xvh9-35w9-42m4

## Related threats

- [Backstage backend-defaults improper access control in action invocation](https://junglewise.ai/threats/cve-2026-106495-backstage-improper-access-control-in-backend-action-invocation)
- [Backstage backend-defaults path traversal in cloud storage URL readers](https://junglewise.ai/threats/cve-2026-106494-backstage-is-an-open-framework-for-building-developer-portals)
- [Backstage backend-defaults service credential delegation bypass](https://junglewise.ai/threats/cve-2026-106492-backstage-is-an-open-framework-for-building-developer-portals)
- [Backstage Scaffolder symlink path traversal in multiple actions](https://junglewise.ai/threats/cve-2026-24046-backstage-scaffolder-symlink-path-traversal-in-multiple-actions)