---
id: CVE-2026-106489
title: Backstage is an open framework for building developer portals
summary: >-
  Backstage is an open framework for building developer portals. Prior to 2.2.4,
  the @backstage/plugin-techdocs-backend package is affected by improper
  authorization enforcement for techdocs static content. An authenticated user
  with acces…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-22
  - CWE-862
  - CWE-639
vendor: backstage
product: backstage
affected:
  - backstage < 1.54.6
  - plugin-techdocs-backend < 2.2.4
published: '2026-10-06'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T16:17:39.200'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106489'
references:
  - url: >-
      https://github.com/backstage/backstage/commit/bf6bbf7326ada7d96d7b2c4ebc4a71546106f311
    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-rg9r-hr7g-5gc2
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106489.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-106489'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2547195'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-106489'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106489'
  - url: 'https://github.com/advisories/GHSA-rg9r-hr7g-5gc2'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - ghsa
  - npm
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-07T15:27:04.062511Z'
ingestedAt: '2026-10-06T21:20:28.984Z'
aliases:
  - GHSA-rg9r-hr7g-5gc2
ecosystem: npm
patched:
  - '@backstage/plugin-techdocs-backend 2.2.4'
epss: 0.00289
epssPercentile: 0.213
---

## Overview

Backstage is an open framework for building developer portals. Prior to 2.2.4, the @backstage/plugin-techdocs-backend package is affected by improper authorization enforcement for techdocs static content. An authenticated user with access to one TechDocs documentation site could craft a URL able to read documentation belonging to a different entity. This only affects deployments using the external TechDocs builder with an external storage provider (S3, GCS, etc.) and the permission framework enabled. Instances that do not use the permission framework are unaffected, since TechDocs content is visible to all authenticated users by design. This issue is fixed in version 2.2.4.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Developer Hub, Self-service automation portal 2 · no fix planned: Red Hat Developer Hub, Self-service automation portal 2 · updated 2026-10-07 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106489.json)

## Package advisory (CVE-2026-106489)

Affected packages:

- `@backstage/plugin-techdocs-backend < 2.2.4`

Patched in:

- `@backstage/plugin-techdocs-backend 2.2.4`

Source: https://github.com/advisories/GHSA-rg9r-hr7g-5gc2