CVE-2026-42283CWE-200CWE-306

DevSpace UI Server WebSocket CheckOrigin does not validate source

High · published May 14, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
3.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00150 · 3.8th percentile
Weaknesses
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor; CWE-306 · Missing Authentication for Critical Function
Published
2026-05-14T15:44Z
EPSS history
Timeline
  • 14 MAY 15:44Z
    DevSpace UI Server WebSocket CheckOrigin does not validate source
    cvelistv5