CVE-2026-42283

HIGH

DevSpace UI Server WebSocket CheckOrigin does not validate source

Title source: cna
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 7.7
EPSS 0.0015
EPSS Percentile 4.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-200 CWE-306
Status published
Products (3)
devspace/devspace 6.3.20
devspace-sh/devspace < 6.3.21
loft-sh/devspace 6.3.20 - 6.3.21Go
Published May 14, 2026
Tracked Since May 14, 2026