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

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). 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
    npm install @backstage/backend-defaults@0.17.8
  • @backstage/plugin-catalog-backend-module-aws (npm): upgrade to 0.4.27 or later
    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
    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

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