PT-2026-40945 · Loft Sh · Loft

Published 2026-05-14 · Updated 2026-05-14 · CVE-2026-42457

NVD

CVSS v3.1

9.0

Critical

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

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.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-42457

Affected Products

Loft

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-42457 · Security Note
• https://github.com/loft-sh/loft/security/advisories/GHSA-x7cq-v3h6-426c · Note