DevSpace UI Server WebSocket CheckOrigin does not validate source

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.7 · CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS

• CVE-2026-42283: 0.15% estimated exploitation activity in the next 30 days; percentile 4.37 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Description 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 allows an attacker to access: /api/logs to stream real-time pod logs /api/enter to open an interactive shell inside the running pod /api/command to execute pre-defined pipeline commands Patches Versions 6.3.21 and above are patched. Resources gorilla/websocket CheckOrigin documentation Installation Options Devspace is no longer publishing to NPM or Yarn, please continue to use our other installation methods to get updates in the future, including this patch. Credit DevSpace thanks @b0b0haha for finding and reporting this vulnerability.

Published by the source

6 May 2026, 17:05 UTC

Last modified by the source

14 May 2026, 20:51 UTC

Source last checked

26 Oct 2026, 15:22 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-hqwm-7x7x-8379

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# Patch Next advisory brief: CVE-2026-42283

Advisory: DevSpace UI Server WebSocket CheckOrigin does not validate source
IDs: CVE-2026-42283, GHSA-hqwm-7x7x-8379
Record: https://patchnext.com/advisories/cve-2026-42283 (revision 1, source checked 26 Oct 2026, 15:22 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/loft-sh/devspace 6.3.21. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/loft-sh/devspace: affected >= 6.3.20, <= 6.3.20; fixed in 6.3.21

## Suggested inspection (read-only)
- Go github.com/loft-sh/devspace: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/loft-sh/devspace.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-hqwm-7x7x-8379 (GitHub-reviewed advisory GHSA-hqwm-7x7x-8379 lists affected ranges: Go github.com/loft-sh/devspace >=6.3.20 <=6.3.20)

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