CVE-2026-106486
HighCVSS 8.5Exploitation Probability (EPSS)
Low risk24th percentile - higher than 24% of all known CVEs
Summary
The @backstage/plugin-scaffolder-backend-module-bitbucket-cloud before 0.3.10 and @backstage/plugin-scaffolder-backend-module-bitbucket-server before 0.2.25 do not sufficiently validate filesystem paths in Bitbucket pull-request Scaffolder actions. An authenticated user who can execute an eligible template and influence an allowed Bitbucket repository could affect paths outside the expected working area.
Risk Assessment
This may compromise backend confidentiality, integrity, or availability. An attacker could access files outside the intended working area.
Recommendation
Update @backstage/plugin-scaffolder-backend-module-bitbucket-cloud to 0.3.10 and @backstage/plugin-scaffolder-backend-module-bitbucket-server to 0.2.25 (or later). Restrict template execution to trusted users.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS