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CVE-2026-106486

Backstage: Improper filesystem validation in Bitbucket pull-request scaffolder actions PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
backstage / backstageaffected < 1.54.6
@backstage / plugin-scaffolder-backend-module-bitbucket-cloudaffected < 0.3.10
@backstage / plugin-scaffolder-backend-module-bitbucket-serveraffected < 0.2.25

CWE

CWE-22, CWE-59

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.