CVE-2026-106486

Fixed upstream EPSS <1%CVSS 8.5

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.

Published 2026-10-06 · CVE record · OSV

Products: backstage, @backstage plugin-scaffolder-backend-module-bitbucket-cloud, @backstage plugin-scaffolder-backend-module-bitbucket-server

Fixed upstream