---
id: CVE-2026-106497
title: Backstage is an open framework for building developer portals
summary: >-
  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…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-178
  - CWE-863
vendor: backstage
product: backstage
affected:
  - backstage < 1.54.6
  - plugin-catalog-backend < 3.9.1
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T22:17:04.560'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106497'
references:
  - url: >-
      https://github.com/backstage/backstage/commit/21424faa2e280a6bc6b9e5c5245952f16aafca7b
    label: security-advisories@github.com
  - url: 'https://github.com/backstage/backstage/releases/tag/v1.54.6'
    label: security-advisories@github.com
  - url: >-
      https://github.com/backstage/backstage/security/advisories/GHSA-8429-xpcj-3cg5
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-06T22:23:15.966Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.