Backstage: Improper preservation of access restrictions during service credential delegation
Backstage is an open framework for building developer portals. Prior to 0.16.1 and 0.17.8, the @backstage/backend-defaults package is affected by improper preservation of access restrictions during service credential delegation. An external service credential configured with access restrictions (e.g., read-only) could bypass those restrictions by routing requests through plugin delegation paths. This could allow a restricted service to perform operations beyond its intended scope, including write operations on plugins it was restricted to read-only access for. This issue is fixed in versions 0.16.1 and 0.17.8.
CVE-2026-106492
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-2026-106492
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
backend-defaults
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, < 1.54.6"
}
]
},
{
"vendor": "@backstage",
"product": "backend-defaults",
"versions": [
{
"status": "affected",
"version": "< 0.16.1"
},
{
"status": "affected",
"version": ">= 0.17.0, < 0.17.8"
}
]
}
]- Related CVEs
- CVE-2026-106492
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #16152 · Revision 1
- Added to Heist Feed
- Publisher date