CVE-2026-106462
Backstage: Scaffolder credential handling may allow unintended GitHub authentication fallback
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
Backstage is an open framework for building developer portals. Prior to 1.54.6, scaffolder source-control actions may not consistently enforce intended credential boundaries. An authenticated user could cause an affected action to fall back to broader integration credentials and perform operations with more access than intended. This issue is fixed in 1.54.6 when operators also enable scaffolder.requireScmUserCredentials after upgrading.
| CWE | CWE-441 CWE-863 |
| Vendor | backstage |
| Product | backstage |
| Published | Oct 6, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
backstage / backstage
< 1.54.6
@backstage / plugin-scaffolder-backend
< 4.1.0
@backstage / plugin-scaffolder-backend-module-azure
< 0.2.25
@backstage / plugin-scaffolder-backend-module-bitbucket-cloud
< 0.3.10
@backstage / plugin-scaffolder-backend-module-bitbucket-server
< 0.2.25
@backstage / plugin-scaffolder-backend-module-github
< 0.9.13
@backstage / plugin-scaffolder-backend-module-gitlab
< 0.11.10