Backstage: Sensitive information exposure in Scaffolder
Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder. An authenticated Backstage user who can read another user's Scaffolder task may receive internal execution data. In deployments where that data contains credentials for an external service, this may permit disclosure and unauthorized changes in that external service. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.
CVE-2026-106501
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-2026-106501
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-scaffolder-backend
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": "< 1.49.6"
},
{
"status": "affected",
"version": ">= 1.50.0-next.0, < 1.50.5"
},
{
"status": "affected",
"version": ">= 1.51.0-next.0, < 1.54.6"
}
]
},
{
"vendor": "@backstage",
"product": "plugin-scaffolder-backend",
"versions": [
{
"status": "affected",
"version": "< 3.3.1"
},
{
"status": "affected",
"version": ">= 3.4.0, < 3.4.1"
},
{
"status": "affected",
"version": ">= 4.0.0, < 4.0.3"
},
{
"status": "affected",
"version": ">= 4.0.4, < 4.1.0"
}
]
}
]- Related CVEs
- CVE-2026-106501
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #12015 · Revision 1
- Added to Heist Feed
- Publisher date