CVE-2026-106497
Medium
Description
Backstage is an open framework for building developer portals. Prior to 3.9.1, the @backstage/plugin-catalog-backend package is affected by inconsistent catalog property permission evaluation. In deployments that use affected value-based catalog permission conditions as a confidentiality boundary, an authenticated user could receive catalog entity data that policy authors intended to restrict. This issue is fixed in version 3.9.1.
SeverityMedium
CVSS4.3
Exploit probability—
Product
Linuxfoundation Backstage Plugin-catalog-backend
PublishedOct 6, 2026
First seenOct 6, 2026
Weakness typeCWE-178CWE-178CWE-863Incorrect authorization
How to fix
Update
- linuxfoundation backstage_plugin-catalog-backend3.9.1 or later
- linuxfoundation backstage1.54.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linuxfoundation backstage_plugin-catalog-backend | v < 3.9.1 | 3.9.1 |
| linuxfoundation backstage | v < 1.54.6 | 1.54.6 |
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