---
id: CVE-2026-106505
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
  and 1.15.4, the @backstage/plugin-techdocs-node package is affected by bypass
  of mkdocs configuration sanitizer in techdocs backend. Users with the ability
  to…
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-426
  - CWE-436
  - CWE-94
vendor: linuxfoundation
product: backstage_plugin-techdocs-node
affected:
  - backstage_plugin-techdocs-node < 1.14.6
  - 'backstage_plugin-techdocs-node >= 1.15.0, < 1.15.4'
  - backstage < 1.50.5
  - 'backstage >= 1.51.1, < 1.54.6'
  - backstage = 1.51.0
patched:
  - backstage_plugin-techdocs-node 1.15.4
  - backstage 1.54.6
published: '2026-10-06'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T17:58:21.970'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106505'
references:
  - url: >-
      https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9
    label: security-advisories@github.com
  - url: >-
      https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db
    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-p75x-jh7p-ppcx
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106505'
  - url: 'https://github.com/advisories/GHSA-p75x-jh7p-ppcx'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106505.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-106505'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2547230'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-106505'
tags:
  - nvd
  - ghsa
  - npm
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00312
epssPercentile: 0.23913
aliases:
  - GHSA-p75x-jh7p-ppcx
ecosystem: npm
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-07T16:12:41.246162Z'
scores:
  nvd: 7.7
  vendor: 6.3
  ghsa: 7.7
ingestedAt: '2026-10-06T22:23:15.968Z'
---

## Overview

Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package is affected by bypass of mkdocs configuration sanitizer in techdocs backend. Users with the ability to commit changes to a repository that uses TechDocs can circumvent the MkDocs configuration file sanitizer introduced in response to CVE-2026-25153 and execute arbitrary code on the TechDocs backend host during documentation generation. This issue is fixed in versions 1.14.6 and 1.15.4.

## Affected

- `backstage_plugin-techdocs-node < 1.14.6`
- `backstage_plugin-techdocs-node >= 1.15.0, < 1.15.4`
- `backstage < 1.50.5`
- `backstage >= 1.51.1, < 1.54.6`
- `backstage = 1.51.0`

## Remediation

Upgrade past the affected range:

- `backstage_plugin-techdocs-node 1.15.4`
- `backstage 1.54.6`

## Package advisory (CVE-2026-106505)

Affected packages:

- `@backstage/plugin-techdocs-node < 1.15.4`

Patched in:

- `@backstage/plugin-techdocs-node 1.15.4`

Source: https://github.com/advisories/GHSA-p75x-jh7p-ppcx

## 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 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106505.json)