CVE-2026-106462
Backstage: Scaffolder credential handling may allow unintended GitHub authentication fallback
MEDIUM 6.4
At a glance
- Source
- NVD
- EPSS
- EPSS 0.17 % · percentile 7 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Analyzed
Description
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.
Weaknesses (CWE)
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | GitHub_M |
| CVSS 3.1 | MEDIUM 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | NVD · security-advisories@github.com (Secondary) |
Advisories
- GHSA-29gx-h2m3-xw44 — Backstage's scaffolder credential handling may allow unintended GitHub authentication fallback
European references
- ENISA EUVD · EUVD-2026-93999
- GCVE · GCVE-0-2026-106462
Affected configurations (NVD CPE)
cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend:*:*:*:*:*:node.js:*:*< 0.11.10cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-azure:*:*:*:*:*:node.js:*:*< 0.2.25cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-bitbucket-cloud:*:*:*:*:*:node.js:*:*< 0.3.10cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-bitbucket-server:*:*:*:*:*:node.js:*:*< 0.2.25cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-github:*:*:*:*:*:node.js:*:*< 0.9.13cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-gitlab:*:*:*:*:*:node.js:*:*< 0.11.10cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*< 1.54.6
Affected products
| Product | Versions |
|---|---|
| backstage · backstage | affected < 1.54.6 |
| @backstage · plugin-scaffolder-backend | affected < 4.1.0 |
| @backstage · plugin-scaffolder-backend-module-azure | affected < 0.2.25 |
| @backstage · plugin-scaffolder-backend-module-bitbucket-cloud | affected < 0.3.10 |
| @backstage · plugin-scaffolder-backend-module-bitbucket-server | affected < 0.2.25 |
| @backstage · plugin-scaffolder-backend-module-github | affected < 0.9.13 |
| @backstage · plugin-scaffolder-backend-module-gitlab | affected < 0.11.10 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |