CVE-2026-42283

DevSpace UI Server WebSocket CheckOrigin does not validate source

Published May 14, 2026 CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-hqwm-7x7x-8379 DevSpace UI Server WebSocket CheckOrigin does not validate source
History
Type Values Removed Values Added
CPEs cpe:2.3:a:devspace:devspace:6.3.20:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Devspace
Devspace devspace
Vendors & Products Devspace
Devspace devspace
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title DevSpace UI Server WebSocket CheckOrigin does not validate source
Weaknesses CWE-200
CWE-306
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 16, 2026, 12:36 AM
Reserved
Apr 26, 2026, 12:13 PM
Status
Analyzed
Published
May 14, 2026, 4:16 PM
Modified
Nov 11, 2026, 8:10 PM