---
id: CVE-2026-106556
title: Backstage is an open framework for building developer portals
summary: >-
  Backstage is an open framework for building developer portals. Prior to
  1.14.6, the @backstage/plugin-techdocs-node package is affected by
  configuration bypass in techdocs mkdocs.yml sanitization. Insufficient
  validation of MkDocs config…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L'
cwe:
  - CWE-78
  - CWE-184
vendor: backstage
product: backstage
affected:
  - backstage < 1.50.5
  - 'backstage >= 1.51.0-next.0, < 1.54.6'
  - plugin-techdocs-node < 1.14.6
  - 'plugin-techdocs-node >= 1.15.0, < 1.15.4'
published: '2026-10-07'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T17:16:50.780'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106556'
references:
  - url: >-
      https://github.com/backstage/backstage/commit/25125ee727a3de3418a8fa6a9e458cd5b73ecf26
    label: security-advisories@github.com
  - url: >-
      https://github.com/backstage/backstage/commit/b6d1aea0bef99b8dfec3c8746032474867ba677a
    label: security-advisories@github.com
  - url: 'https://github.com/backstage/backstage/releases/tag/v1.50.5'
    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-g2hj-v2j6-vfvg
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-07T16:15:35.192583Z'
ingestedAt: '2026-10-07T15:36:04.052Z'
---

## Overview

Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by configuration bypass in techdocs mkdocs.yml sanitization. Insufficient validation of MkDocs configuration during TechDocs generation could allow an authenticated user who can register or modify documentation sources to execute arbitrary commands in the build environment. Impact is limited to resources accessible to the TechDocs backend or build container. This issue is fixed in versions 1.14.6 and 1.15.4.

## Remediation

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