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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-269",
"CWE-863"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106492.json",
"unresolved_ranges": [
{
"extracted_events": [
{
"introduced": "0.17.0"
},
{
"fixed": "0.17.8"
}
],
"source": "AFFECTED_FIELD"
}
]
}{
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "1.49.6"
},
{
"fixed": "0.16.1"
},
{
"introduced": "1.50.0-next.0"
},
{
"fixed": "1.54.6"
}
],
"source": "AFFECTED_FIELD"
}