{"answers":{"affected":"2 open source packages ship an affected version, including @backstage/plugin-kubernetes-backend. It affects 2 products.","exploited":"There is no known exploitation of CVE-2026-106487 in the wild and no public exploit code.","fix":"Upgrade @backstage/plugin-kubernetes-backend to 0.21.10 or later.","what":"CVE-2026-106487 is a low-severity 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-2026-106487 and fix it if it is affected.\n\nWhat it is: CVE-2026-106487 is a low-severity 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-2026-106487 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @backstage/plugin-kubernetes-backend (npm): affected all versions; fixed in 0.21.10\n- @backstage/plugin-kubernetes-backend (npm): affected all versions; fixed in 0.21.10\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-2026-106487/ (Markdown: https://insights.sbomify.com/CVE-2026-106487/index.md)","id":"CVE-2026-106487","markdown":"https://insights.sbomify.com/CVE-2026-106487/index.md","name":"CVE-2026-106487","record":{"aliases":["GHSA-h53x-hjx6-25gr"],"analysis":{"component_type":"developer_tool","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Backstage Kubernetes backend","requires_auth":"low_privilege","summary":"Attackers with catalog permissions can bypass authentication modes to access Kubernetes resources via the backend's local identity.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"backstage","vendor":"linuxfoundation"},{"product":"backstage\\/plugin-kubernetes-backend","vendor":"linuxfoundation"}],"cvss":{"score":3.5,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-441","name":"Unintended Proxy or Intermediary"}],"description":"Backstage is an open framework for building developer portals. Prior to 0.21.10, the @backstage/plugin-kubernetes-backend package is affected by unsupported catalog cluster authentication mode in kubernetes backend. Deployments using catalog cluster discovery may be affected when catalog contributors can create or modify kubernetes-cluster Resource entities. With the required endpoint permissions and pod RBAC, the backend can use its local in-cluster identity, potentially exposing Kubernetes resources readable by that identity. The credential is used only with the local in-cluster API endpoint and is not sent to the catalog-supplied endpoint. This issue is fixed in version 0.21.10.","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: Unsupported catalog cluster authentication mode in kubernetes backend","id":"CVE-2026-106487","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":"linuxfoundation:backstage","products":["linuxfoundation:backstage"],"type":"security_feature_bypass","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"Backstage: Improper authentication in the OIDC provider","id":"CVE-2026-106488"},"packages":[{"ecosystem":"npm","fixed":["0.21.10"],"introduced":["0"],"last_affected":[],"package":"@backstage/plugin-kubernetes-backend","purl":null,"source":"GHSA-h53x-hjx6-25gr"},{"ecosystem":"npm","fixed":["0.21.10"],"introduced":["0"],"last_affected":[],"package":"@backstage/plugin-kubernetes-backend","purl":"pkg:npm/%40backstage/plugin-kubernetes-backend","source":"GHSA-h53x-hjx6-25gr"}],"prev":{"headline":"Backstage: Improper filesystem validation in Bitbucket pull-request scaffolder actions","id":"CVE-2026-106486"},"products":["backstage","plugin-kubernetes-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":"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":"partial"},"state":"PUBLISHED","updated":"2026-10-09","vendors":["@backstage","backstage"]},"summary":"Attackers with catalog permissions can bypass authentication modes to access Kubernetes resources via the backend's local identity.","url":"https://insights.sbomify.com/CVE-2026-106487/"}