---
id: CVE-2026-106559
title: Backstage is an open framework for building developer portals
summary: >-
  Backstage is an open framework for building developer portals. Prior to
  0.3.25, the @backstage/plugin-scaffolder-backend-module-confluence-to-markdown
  package is affected by improper input validation in confluence to markdown
  scaffolder …
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L'
cwe:
  - CWE-22
  - CWE-73
vendor: backstage
product: backstage
affected:
  - backstage < 1.54.6
  - plugin-scaffolder-backend-module-confluence-to-markdown < 0.3.25
published: '2026-10-07'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T17:16:51.070'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106559'
references:
  - url: >-
      https://github.com/backstage/backstage/commit/506c2c11bce3ed9d1f8f50de5d6474b16e43a65e
    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-75qf-886x-5xf2
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106559'
  - url: 'https://github.com/advisories/GHSA-75qf-886x-5xf2'
tags:
  - nvd
  - cve.org
  - ghsa
  - npm
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-07T16:16:10.333361Z'
ingestedAt: '2026-10-07T15:36:04.052Z'
aliases:
  - GHSA-75qf-886x-5xf2
ecosystem: npm
patched:
  - '@backstage/plugin-scaffolder-backend-module-confluence-to-markdown 0.3.25'
---

## Overview

Backstage is an open framework for building developer portals. Prior to 0.3.25, the @backstage/plugin-scaffolder-backend-module-confluence-to-markdown package is affected by improper input validation in confluence to markdown scaffolder module. Insufficient input validation in the Confluence to Markdown scaffolder module could allow an attacker to influence file write operations during template execution. Exploitation requires a Backstage user to run a template that processes attacker-influenced Confluence content. This issue is fixed in version 0.3.25.

## Remediation

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

## Package advisory (CVE-2026-106559)

Affected packages:

- `@backstage/plugin-scaffolder-backend-module-confluence-to-markdown < 0.3.25`

Patched in:

- `@backstage/plugin-scaffolder-backend-module-confluence-to-markdown 0.3.25`

Source: https://github.com/advisories/GHSA-75qf-886x-5xf2