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CVE-2026-42457

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CVE-2026-42457

Published: May 14, 2026

Modified: May 14, 2026

PUBLISHED

CVSS v3.1

9.0

CRITICAL

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.

VendorProductVersions

loft-sh

loft

affected
< 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

Weaknesses (CWE)

CWE-79

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

References

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