Backstage: Configuration bypass in TechDocs mkdocs.yml sanitization
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.
CVE-2026-106556
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-106556
backstage
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
plugin-techdocs-node
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "backstage",
"product": "backstage",
"versions": [
{
"status": "affected",
"version": "< 1.50.5"
},
{
"status": "affected",
"version": ">= 1.51.0-next.0, < 1.54.6"
}
]
},
{
"vendor": "@backstage",
"product": "plugin-techdocs-node",
"versions": [
{
"status": "affected",
"version": "< 1.14.6"
},
{
"status": "affected",
"version": ">= 1.15.0, < 1.15.4"
}
]
}
]- Related CVEs
- CVE-2026-106556
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #11977 · Revision 1
- Added to Heist Feed
- Publisher date