{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42457", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-27T13:55:58.693Z", "datePublished": "2026-05-14T14:48:05.096Z", "dateUpdated": "2026-05-14T19:51:50.476Z"}, "containers": {"cna": {"title": "vCluster Platform: Stored XSS can lead to privilege escalation", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/loft-sh/loft/security/advisories/GHSA-x7cq-v3h6-426c", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/loft-sh/loft/security/advisories/GHSA-x7cq-v3h6-426c"}], "affected": [{"vendor": "loft-sh", "product": "loft", "versions": [{"version": "< 4.4.3", "status": "affected"}, {"version": ">=4.5.0-alpha.0 , < 4.5.5", "status": "affected"}, {"version": ">= 4.6.0-alpha.1, < 4.6.2", "status": "affected"}, {"version": ">= 4.7.0-alpha.0, < 4.7.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-14T14:48:05.096Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-x7cq-v3h6-426c", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-14T16:02:15.926679Z", "id": "CVE-2026-42457", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-14T19:51:50.476Z"}}]}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-42457", "lastModified": "2026-05-14T17:19:49.973", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 6.0, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-14T15:16:46.500", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/loft-sh/loft/security/advisories/GHSA-x7cq-v3h6-426c"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.4.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.5.0-alpha.0,4.5.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.6.0-alpha.1,4.6.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.7.0-alpha.0,4.7.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "loft", "source": "cna", "vendor": "loft-sh"}, "product": "loft", "vendor": "loft-sh"}], "created": "2026-05-14T16:30:24.191607+00:00", "updated": "2026-05-14T16:30:24.544914+00:00", "vendors": ["loft-sh", "loft-sh$PRODUCT$loft"]}