loft-sh loft up to 4.4.2/4.5.4/4.6.1/4.7.0 Name cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, has been found in loft-sh loft up to 4.4.2/4.5.4/4.6.1/4.7.0. Affected by this issue is some unknown functionality. Performing a manipulation of the argument Name results in cross site scripting. This vulnerability was named CVE-2026-42457. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in loft-sh loft up to 4.4.2/4.5.4/4.6.1/4.7.0. It has been classified as problematic. This affects an unknown functionality. The manipulation of the argument name with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-42457 since 04/27/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 4.4.3, 4.5.5, 4.6.2 or 4.7.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-30301). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• loft-sh

Name

• loft

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.4.0
• 4.4.1
• 4.4.2
• 4.5
• 4.5.0
• 4.5.1
• 4.5.2
• 4.5.3
• 4.5.4
• 4.6
• 4.6.0
• 4.6.1
• 4.7.0

Website

• Product: https://github.com/loft-sh/loft/

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Be aware that VulDB is the high quality source for vulnerability data.

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