{"answers":{"affected":"4 open source packages ship an affected version, including @backstage/plugin-scaffolder-backend-module-bitbucket-cloud and @backstage/plugin-scaffolder-backend-module-bitbucket-server. It affects 3 products.","exploited":"There is no known exploitation of CVE-2026-106486 in the wild and no public exploit code.","fix":"Upgrade @backstage/plugin-scaffolder-backend-module-bitbucket-cloud to 0.3.10 or later.","what":"CVE-2026-106486 is a high-severity path traversal vulnerability in Linuxfoundation Backstage, published on 6 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-106486 and fix it if it is affected.\n\nWhat it is: CVE-2026-106486 is a high-severity path traversal vulnerability in Linuxfoundation Backstage, published on 6 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-106486 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @backstage/plugin-scaffolder-backend-module-bitbucket-cloud (npm): affected all versions; fixed in 0.3.10\n- @backstage/plugin-scaffolder-backend-module-bitbucket-cloud (npm): affected all versions; fixed in 0.3.10\n- @backstage/plugin-scaffolder-backend-module-bitbucket-server (npm): affected all versions; fixed in 0.2.25\n- @backstage/plugin-scaffolder-backend-module-bitbucket-server (npm): affected all versions; fixed in 0.2.25\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-106486/ (Markdown: https://insights.sbomify.com/CVE-2026-106486/index.md)","id":"CVE-2026-106486","markdown":"https://insights.sbomify.com/CVE-2026-106486/index.md","name":"CVE-2026-106486","record":{"aliases":["GHSA-g8rx-f7m5-7794"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read","data_modify","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Backstage developer portal","requires_auth":"low_privilege","summary":"Authenticated users can exploit improper filesystem validation in Bitbucket scaffolder actions to access or modify files outside the intended directory.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"backstage","vendor":"linuxfoundation"},{"product":"backstage\\/plugin-scaffolder-backend-module-bitbucket-cloud","vendor":"linuxfoundation"},{"product":"backstage\\/plugin-scaffolder-backend-module-bitbucket-server","vendor":"linuxfoundation"}],"cvss":{"score":8.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-59","name":"Improper Link Resolution Before File Access"},{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"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.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Backstage: Improper filesystem validation in Bitbucket pull-request scaffolder actions","id":"CVE-2026-106486","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":"linuxfoundation:backstage","products":["linuxfoundation:backstage"],"type":"path_traversal","year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"Backstage: Unsupported catalog cluster authentication mode in kubernetes backend","id":"CVE-2026-106487"},"packages":[{"ecosystem":"npm","fixed":["0.3.10"],"introduced":["0"],"last_affected":[],"package":"@backstage/plugin-scaffolder-backend-module-bitbucket-cloud","purl":null,"source":"GHSA-g8rx-f7m5-7794"},{"ecosystem":"npm","fixed":["0.3.10"],"introduced":["0"],"last_affected":[],"package":"@backstage/plugin-scaffolder-backend-module-bitbucket-cloud","purl":"pkg:npm/%40backstage/plugin-scaffolder-backend-module-bitbucket-cloud","source":"GHSA-g8rx-f7m5-7794"},{"ecosystem":"npm","fixed":["0.2.25"],"introduced":["0"],"last_affected":[],"package":"@backstage/plugin-scaffolder-backend-module-bitbucket-server","purl":null,"source":"GHSA-g8rx-f7m5-7794"},{"ecosystem":"npm","fixed":["0.2.25"],"introduced":["0"],"last_affected":[],"package":"@backstage/plugin-scaffolder-backend-module-bitbucket-server","purl":"pkg:npm/%40backstage/plugin-scaffolder-backend-module-bitbucket-server","source":"GHSA-g8rx-f7m5-7794"}],"prev":{"headline":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.","id":"CVE-2026-106485"},"products":["backstage","plugin-scaffolder-backend-module-bitbucket-cloud","plugin-scaffolder-backend-module-bitbucket-server"],"published":"2026-10-06","related":[{"cvss_score":9.6,"headline":"Backstage: Sensitive information exposure in Scaffolder","id":"CVE-2026-106501","kev_date_added":null,"published":"2026-10-06"},{"cvss_score":8.8,"headline":"Backstage: Improper validation of TechDocs MkDocs configuration","id":"CVE-2026-106558","kev_date_added":null,"published":"2026-10-07"},{"cvss_score":8.8,"headline":"Backstage: Improper input validation in TechDocs MkDocs configuration","id":"CVE-2026-88064","kev_date_added":null,"published":"2026-09-16"},{"cvss_score":8.5,"headline":"Backstage: Improper input validation in Sentry scaffolder actions","id":"CVE-2026-106459","kev_date_added":null,"published":"2026-10-06"},{"cvss_score":8.5,"headline":"Backstage: Improper task state validation in Scaffolder backend","id":"CVE-2026-106500","kev_date_added":null,"published":"2026-10-06"},{"cvss_score":8.5,"headline":"Path Traversal in @backstage/plugin-scaffolder-backend","id":"CVE-2021-43783","kev_date_added":null,"published":"2021-11-29"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-07","vendors":["@backstage","backstage"]},"summary":"Authenticated users can exploit improper filesystem validation in Bitbucket scaffolder actions to access or modify files outside the intended directory.","url":"https://insights.sbomify.com/CVE-2026-106486/"}