CVE-2026-106486
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| backstage | backstage | < 1.54.6 | affected |
| @backstage | plugin-scaffolder-backend-module-bitbucket-cloud | < 0.3.10 | affected |
| @backstage | plugin-scaffolder-backend-module-bitbucket-server | < 0.2.25 | affected |
Weaknesses
- CWE-22: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
- CWE-59: CWE-59: Improper Link Resolution Before File Access ('Link Following')
References
- https://github.com/backstage/backstage/security/advisories/GHSA-g8rx-f7m5-7794
- https://github.com/backstage/backstage/commit/818528e112c36167d76187e9e63fb518399c4dd2
- https://github.com/backstage/backstage/releases/tag/v1.54.6
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