{"id":"CVE-2026-42457","summary":"vCluster Platform: Stored XSS can lead to privilege escalation","details":"vCluster Platform provides a Kubernetes platform for managing virtual clusters, multi-tenancy, and cluster sharing. Prior to 4.4.3, 4.5.5, 4.6.2, 4.7.1, and 4.8.0, there is a Stored XSS attack vulnerability via the name field of a templateRef. This can lead to the execution of arbitrary external scripts within the platform's browser context. In the worst case, a malicious user could potentially create a new Global-Admin user, bypassing other security restrictions. The attacker needs the ability to create namespaces. This vulnerability is fixed in 4.4.3, 4.5.5, 4.6.2, 4.7.1, and 4.8.0.","aliases":["GHSA-x7cq-v3h6-426c"],"modified":"2026-08-12T03:51:43.361595310Z","published":"2026-05-14T14:48:05.096Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42457.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"4.5.0-alpha.0"},{"fixed":"4.5.5"},{"introduced":"4.6.0-alpha.1"},{"fixed":"4.6.2"},{"introduced":"4.7.0-alpha.0"},{"fixed":"4.7.1"}]}]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42457.json"},{"type":"ADVISORY","url":"https://github.com/loft-sh/loft/security/advisories/GHSA-x7cq-v3h6-426c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42457"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/loft-sh/loft","events":[{"introduced":"0"},{"fixed":"76e6e9a0a1cc13b7d945c9809860ac3736403164"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"4.4.3"}],"source":"AFFECTED_FIELD"}}],"versions":["v4.4.3-rc.2","v4.0.0-alpha.6","v4.0.0-alpha.5","v4.0.0-alpha.4","v3.4.6","v3.5.0-alpha.5","v3.5.0-alpha.4","v3.4.6-rc.1","v4.0.0-alpha.3","v4.0.0-alpha.2","v4.0.0-alpha.1","v3.5.0-alpha.3","v4.0.0-alpha.0","v3.5.0-alpha.2","v3.4.6-beta.0","v3.5.0-alpha.1","v3.4.6-alpha.1","v3.5.0-alpha.0","v3.4.5","v3.4.4-beta.6","v3.4.4-beta.5","v3.4.4-beta.4","v3.4.4","v3.4.4-beta.3","v3.4.3-beta.2","v3.4.3-beta.1","v3.4.3","v3.4.3-beta.0","v3.4.2-beta.1","v3.4.2","v3.4.2-beta.0","v3.4.1-beta.0","v3.4.1","v2.0.1","v2.0.1-beta.0","v2.0.0","v2.0.0-rc.1","v2.0.0-rc.0","v2.0.0-beta.2","v2.0.0-beta.1","v2.0.0-beta.0","v2.0.0-alpha.13","v2.0.0-alpha.12","v2.0.0-alpha.11","v2.0.0-alpha.10","v2.0.0-alpha.9","v2.0.0-alpha.8","v2.0.0-alpha.7","v2.0.0-alpha.6","v2.0.0-alpha.5","v2.0.0-alpha.4","v2.0.0-alpha.2","v2.0.0-alpha.1","v2.0.0-alpha.0","v1.15.1-beta.0","v1.15.0","v1.15.0-rc.2","v1.15.0-rc.1","v1.15.0-beta.3","v1.15.0-beta.2","v1.15.0-beta.1","v1.15.0-beta.0","v1.15.0-alpha.1","v1.14.0","v1.14.0-beta.0","v1.13.1","v1.13.1-beta.1","v1.13.1-beta.0","v1.13.0","v1.13.0-alpha.5","v1.13.0-alpha.4","v1.12.2-ie11","v1.12.2","v1.12.1","v1.12.1-beta.7","v1.12.1-beta.6","v1.12.1-beta.2","v1.12.1-beta.1","v1.12.1-beta.0","v1.12.0-ie11","v1.12.0","v1.12.0-beta.1","v1.12.0-beta.0","v1.12.0-alpha.1","v1.12.0-alpha.0","v1.11.1-kubernetes.115","v1.11.1","v1.11.0","v1.11.0-beta.3","v1.11.0-beta.2","v1.11.0-beta.1","v1.11.0-beta.0","v1.10.2-beta.2","v1.10.2-beta.1","v1.10.2-beta.0","v1.10.2-alpha.0","v1.10.1","v1.10.0","v1.10.0-beta.1","v1.10.0-beta.0","v1.9.3-kubernetes.115","v1.9.3-beta.1","v1.9.3","v1.9.3-beta.0","v1.9.2-kubernetes.115.1","v1.9.2-kubernetes.115","v1.9.2","v1.9.1-kubernetes.115","v1.9.1-beta.1","v1.9.1-beta.0","v1.9.1","v1.9.0-beta.2","v1.9.0-beta.1","v1.9.0","v1.9.0-beta.0","v1.8.2-beta.1","v1.8.2-beta.0","v1.8.2","v1.8.1","v1.8.0","v1.8.0-beta.0","v1.7.2-beta.0","v1.7.2","v1.7.1-beta.0","v1.7.1","v1.7.0-beta.1","v1.7.0-beta.0","v1.7.0","v1.6.2","v1.6.1","v1.6.0-beta.0","v1.6.0","v1.5.5","v1.5.4","v1.5.3","v1.5.2-beta.1","v1.5.2-beta.0","v1.5.2","v1.5.1","v1.5.0-beta.0","v1.5.0","v1.4.1-beta.1","v1.4.1-beta.0","v1.4.1","v1.4.0-beta.2","v1.4.0","v1.3.1","v1.3.0","v1.3.0-beta.6","v1.3.0-beta.5","v1.3.0-beta.4","v1.3.0-beta.1","v1.3.0-beta.0","v1.3.0-beta.3","v1.3.0-beta.2","v1.2.2","v1.2.1","v1.2.0-beta.1","v1.2.0-beta.0","v1.2.0","v1.1.0","v1.0.2","v1.0.1","v1.0.0-beta.6","v1.0.0-beta.5","v1.0.0","v1.0.0-beta.4","v1.0.0-beta.3","v1.0.0-beta.2","v1.0.0-beta.1","v1.0.0-beta.0","v0.6.4-beta.1","v0.6.4","v0.6.4-beta.0","v0.6.3","v0.6.2","v0.6.1-beta.0","v0.6.1","v0.6.0","v0.6.0-alpha.1","v0.5.0","v0.5.0-beta.1","v0.4.0","v0.3.9","v0.3.8","v0.3.7","v0.3.6","v0.3.5","v0.3.4","v0.3.3","v0.3.2","v0.3.2-beta.3","v0.3.2-beta.1","v0.3.2-beta.0","v0.3.1","v0.3.0","v0.2.0","v0.1.1","v0.1.0","v0.0.1-beta.40","v0.0.1-beta.39","v0.0.1-beta.38","v0.0.1-beta.37","v0.0.1-beta.36","v0.0.1-beta.35","v0.0.1-beta.34","v0.0.1-beta.33","v0.0.1-beta.32","v0.0.1-beta.31","v0.0.1-beta.30","v0.0.1-beta.29","v0.0.1-beta.28","v0.0.1-beta.27","v0.0.1-beta.26","v0.0.1-beta.25","v0.0.1-beta.24","v0.0.1-beta.16","v0.0.1-beta.15","v0.0.1-beta.14","v0.0.1-beta.13","v0.0.1-beta.12","v0.0.1-beta.11","v0.0.1-beta.10","v0.0.1-beta.8","v0.0.1-beta.7","v0.0.1-beta.6","v0.0.1-beta.5","v0.0.1-beta.4","v0.0.1-beta.3","v0.0.1-beta.2","v0.0.1-beta.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42457.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H"}]}