CVSS 3.1
7.8 highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HCVE-2026-42283
High (7.8) in devspace devspace. EPSS 0.2% chance of exploitation in the next 30 days. Fixed in github.com/loft-sh/devspace 6.3.21.
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.
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 4% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-200, CWE-306
- Published
- Modified
- Record from
- the NVD, synced
Affected
- devspace:devspace
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-hqwm-7x7x-8379 | Go | github.com/loft-sh/devspace | >=6.3.20 <6.3.21 | 6.3.21 |
| GO-2026-5433 | Go | github.com/loft-sh/devspace | all versions | no fix published |