CVE-2026-42283— DevSpace UI Server WebSocket CheckOrigin does not validate source
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| devspace-sh | devspace | < 6.3.21 | affected |
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I. Basic Information for CVE-2026-42283
Vulnerability Information
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Vulnerability Title
DevSpace UI Server WebSocket CheckOrigin does not validate source
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
关键功能的认证机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
DevSpace 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
DevSpace是DevSpace公司的一款使用Kubernetes进行云原生开发的客户端开发者工具。 DevSpace 6.3.21之前版本存在信息泄露漏洞，该漏洞源于UI服务器WebSocket默认接受来自所有源的连接，可能导致恶意网站利用浏览器建立跨源WebSocket连接到ws://127.0.0.1:8090。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| devspace-sh | devspace | < 6.3.21 | - |
II. Public POCs for CVE-2026-42283
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same weakness: CWE-306
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V. Comments for CVE-2026-42283
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