CVE-2026-106462
mediumpriority · track · 0OT risk · elevatedEPSS 0.002 · 7 %ileUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (13)
Products and version ranges known to be affected.
- linuxfoundation backstage/plugin-scaffolder-backend< 0.11.10nvdUScpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend:*:*:*:*:*:*:*:*
- linuxfoundation backstage/plugin-scaffolder-backend-module-azure< 0.2.25nvdUScpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-azure:*:*:*:*:*:*:*:*
- linuxfoundation backstage/plugin-scaffolder-backend-module-bitbucket-cloud< 0.3.10nvdUScpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-bitbucket-cloud:*:*:*:*:*:*:*:*
- linuxfoundation backstage/plugin-scaffolder-backend-module-bitbucket-server< 0.2.25nvdUScpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-bitbucket-server:*:*:*:*:*:*:*:*
- linuxfoundation backstage/plugin-scaffolder-backend-module-github< 0.9.13nvdUScpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-github:*:*:*:*:*:*:*:*
- linuxfoundation backstage/plugin-scaffolder-backend-module-gitlab< 0.11.10nvdUScpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-gitlab:*:*:*:*:*:*:*:*
- npm @backstage/plugin-scaffolder-backend-module-azure< 0.2.25osvUSpkg:npm/%40backstage/plugin-scaffolder-backend-module-azure
- npm @backstage/plugin-scaffolder-backend-module-bitbucket-cloud< 0.3.10osvUSpkg:npm/%40backstage/plugin-scaffolder-backend-module-bitbucket-cloud
- npm @backstage/plugin-scaffolder-backend-module-bitbucket-server< 0.2.25osvUSpkg:npm/%40backstage/plugin-scaffolder-backend-module-bitbucket-server
- npm @backstage/plugin-scaffolder-backend-module-github< 0.9.13osvUSpkg:npm/%40backstage/plugin-scaffolder-backend-module-github
- npm @backstage/plugin-scaffolder-backend-module-gitlab< 0.11.10osvUSpkg:npm/%40backstage/plugin-scaffolder-backend-module-gitlab
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-29gx-h2m3-xw44Backstage's scaffolder credential handling may allow unintended GitHub authentication fallback2026-10-07ghsa · osvUS
### Impact Scaffolder actions that interact with source control systems may not consistently enforce the intended credential boundaries under certain configurations. An authenticated user could perform operations with broader access than intended. ### Patches - `@backstage/plugin-scaffolder-backend` version `4.1.0` - `@backstage/plugin-scaffolder-backend-module-azure` version `0.2.25` - `@backstage/plugin-scaffolder-backend-module-bitbucket-cloud` version `0.3.10` - `@backstage/plugin-scaffolder-backend-module-bitbucket-server` version `0.2.25` - `@backstage/plugin-scaffolder-backend-module-github` version `0.9.13` - `@backstage/plugin-scaffolder-backend-module-gitlab` version `0.11.10` The fix introduces a new configuration option that enforces user-provided credentials for supported SCM actions. The new behavior is opt-in for compatibility. After upgrading, set: ```yaml scaffolder: requireScmUserCredentials: true ``` Before enabling this setting, review and update your templates as described in the software templates documentation referred to below. ### Workarounds If you cannot upgrade and enable the setting immediately: - Restrict who can create Scaffolder tasks and which templates they can execute. - Limit SCM integration credentials to the minimum repository read and mutation permissions required. - Remove integration credentials for SCM hosts where all required operations can use explicitly supplied user tokens.
sources
Which sources assert this record, and when.
references (3) nvd
External citations — patches, advisories, analysis.
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