{"id":"CVE-2026-106487","sourceIdentifier":"security-advisories@github.com","published":"2026-10-06T21:17:17.477","lastModified":"2026-10-22T18:49:32.183","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"backstage","product":"backstage","versions":[{"version":"< 1.54.6","status":"affected"}]},{"vendor":"@backstage","product":"plugin-kubernetes-backend","versions":[{"version":"< 0.21.10","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N","baseScore":3.5,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":1.8,"impactScore":1.4},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N","baseScore":5.0,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.1,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-09T01:49:36.578700Z","id":"CVE-2026-106487","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-441"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:linuxfoundation:backstage\\/plugin-kubernetes-backend:*:*:*:*:*:node.js:*:*","versionEndExcluding":"0.21.10","matchCriteriaId":"11B8BD51-68C6-4620-B96B-7F49CA782148"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*","versionEndExcluding":"1.54.6","matchCriteriaId":"630B6B8B-D515-4FEF-83C7-9CF51C7EB2F5"}]}]}],"references":[{"url":"https://github.com/backstage/backstage/commit/c14f8be6908f0f719b16356e5492352311e28946","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/backstage/backstage/releases/tag/v1.54.6","source":"security-advisories@github.com","tags":["Patch","Release Notes"]},{"url":"https://github.com/backstage/backstage/security/advisories/GHSA-h53x-hjx6-25gr","source":"security-advisories@github.com","tags":["Mitigation","Vendor Advisory"]}]}