{"answers":{"affected":"2 open source packages ship an affected version, including @backstage/plugin-scaffolder-backend. It affects 2 products.","exploited":"There is no known exploitation of CVE-2026-106500 in the wild and no public exploit code.","fix":"Upgrade @backstage/plugin-scaffolder-backend to 4.1.0 or later.","what":"CVE-2026-106500 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-2026-106500 and fix it if it is affected.\n\nWhat it is: CVE-2026-106500 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-2026-106500 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @backstage/plugin-scaffolder-backend (npm): affected all versions; fixed in 4.1.0\n- @backstage/plugin-scaffolder-backend (npm): affected all versions; fixed in 4.1.0\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-2026-106500/ (Markdown: https://insights.sbomify.com/CVE-2026-106500/index.md)","id":"CVE-2026-106500","markdown":"https://insights.sbomify.com/CVE-2026-106500/index.md","name":"CVE-2026-106500","record":{"aliases":["GHSA-xvgh-hmx8-9xxf"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read","data_modify","denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Backstage developer portal","requires_auth":"low_privilege","summary":"Authenticated users can manipulate task states to access or modify backend files, compromising confidentiality, integrity, and availability.","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","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-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"description":"Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by improper task state validation in scaffolder backend. An authenticated user with permission to create and access Scaffolder tasks may, under specific timing and deployment conditions, affect files accessible to the Backstage backend. If backend application files are writable, the confidentiality, integrity, and availability of the backend may be compromised. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.","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 task state validation in Scaffolder backend","id":"CVE-2026-106500","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":"linuxfoundation:backstage","products":["linuxfoundation:backstage"],"type":"path_traversal","year":"2026"},"n_packages":2,"n_references":7,"next":{"headline":"Backstage: Sensitive information exposure in Scaffolder","id":"CVE-2026-106501"},"packages":[{"ecosystem":"npm","fixed":["4.1.0"],"introduced":["0"],"last_affected":[],"package":"@backstage/plugin-scaffolder-backend","purl":null,"source":"GHSA-xvgh-hmx8-9xxf"},{"ecosystem":"npm","fixed":["4.1.0"],"introduced":["0"],"last_affected":[],"package":"@backstage/plugin-scaffolder-backend","purl":"pkg:npm/%40backstage/plugin-scaffolder-backend","source":"GHSA-xvgh-hmx8-9xxf"}],"prev":{"headline":"Backstage: Secret-derived values may be exposed in scaffolder task logs","id":"CVE-2026-106499"},"products":["backstage","plugin-scaffolder-backend"],"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 filesystem validation in Bitbucket pull-request scaffolder actions","id":"CVE-2026-106486","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 manipulate task states to access or modify backend files, compromising confidentiality, integrity, and availability.","url":"https://insights.sbomify.com/CVE-2026-106500/"}