CVE-2026-42283

DevSpace UI Server WebSocket CheckOrigin does not validate source

State: Published
Severity: 7.7 High
Published: May 14, 2026
Updated: May 16, 2026
Reserved: Apr 26, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.7 High	CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-306 Missing Authentication for Critical Function
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Affected Products

Product	Versions
devspacedevspace-sh	< 6.3.21Affected

References

https://github.com/devspace-sh/devspace/security/advisories/GHSA-hqwm-7x7x-8379

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