CVE-2026-42283 HIGH

CVE-2026-42283: DevSpace UI Server WebSocket CheckOrigin does not validate source

Vendor Devspace-Sh
Product devspace
Weakness CWE-306 · Missing auth
Published May 14, 2026
Last update May 16, 2026

CVSS base score

7.7/10
Attack vector Local
Attack complexity High
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

DevSpace is a client-only developer tool for cloud-native development with Kubernetes. Prior to 6.3.21, DevSpace's UI server WebSocket accepts connections from all origins by default, and therefore several endpoints are exposed via this WebSocket. When a developer runs the DevSpace UI and at the same time uses a browser to access the internet, a malicious website they visit can use their browser to establish a cross-origin WebSocket connection to ws://127.0.0.1:8090. This vulnerability is fixed in 6.3.21.

Key dates

02Disclosure timeline

May 14, 2026 CVE published
May 16, 2026 Record updated