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Description

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.

PUBLISHED Reserved 2026-04-27 | Published 2026-05-14 | Updated 2026-05-14 | Assigner GitHub_M




CRITICAL: 9.0CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

< 4.4.3
affected

>=4.5.0-alpha.0 , < 4.5.5
affected

>= 4.6.0-alpha.1, < 4.6.2
affected

>= 4.7.0-alpha.0, < 4.7.1
affected

References

github.com/...h/loft/security/advisories/GHSA-x7cq-v3h6-426c

cve.org (CVE-2026-42457)

nvd.nist.gov (CVE-2026-42457)

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