CVE-2026-106486
Description
Backstage is an open framework for building developer portals. Prior to 0.3.10 in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud and 0.2.25 in @backstage/plugin-scaffolder-backend-module-bitbucket-server, the Bitbucket pull-request Scaffolder actions did not sufficiently validate filesystem paths. An authenticated user who can execute an eligible template and influence an allowed Bitbucket repository could affect paths outside the expected working area, potentially compromising backend confidentiality, integrity, or availability. This issue is fixed in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud 0.3.10 and @backstage/plugin-scaffolder-backend-module-bitbucket-server 0.2.25.
How to fix
- linuxfoundation backstage1.54.6 or later
- linuxfoundation backstage\/plugin-scaffolder-backend-module-bitbucket-cloud0.3.10 or later
- linuxfoundation backstage\/plugin-scaffolder-backend-module-bitbucket-server0.2.25 or later
- @backstage/plugin-scaffolder-backend-module-bitbucket-cloud0.3.10 or later
- @backstage/plugin-scaffolder-backend-module-bitbucket-server0.2.25 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linuxfoundation backstage | v < 1.54.6 | 1.54.6 |
| linuxfoundation backstage\/plugin-scaffolder-backend-module-bitbucket-cloud | v < 0.3.10 | 0.3.10 |
| linuxfoundation backstage\/plugin-scaffolder-backend-module-bitbucket-server | v < 0.2.25 | 0.2.25 |
| @backstage/plugin-scaffolder-backend-module-bitbucket-cloudnpm | v < 0.3.10 | 0.3.10 |
| @backstage/plugin-scaffolder-backend-module-bitbucket-servernpm | v < 0.2.25 | 0.2.25 |
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Attack Surface Management
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