CVE-2026-42283 json
DevSpace UI Server WebSocket CheckOrigin does not validate source
published 2026-05-06 6 mo ago modified 2026-06-25 4 mo ago also GHSA-hqwm-7x7x-8379 , GO-2026-5433 , EUVD-2026-30319
- cvss
- 7.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 4%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/loft-sh/devspace 6.3.21
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 5 mo ago
Exploit prediction
0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.7 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 7.7 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/loft-sh/devspace | >=6.3.20, <6.3.21 all versions |
6.3.21 |
Affected products
- devspace-sh devspace
Classification
References
-
github.com
/devspace-sh/devspace/security/advisories/GHSA-hqwm-7x7x-8379
web, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-42283
advisory
-
github.com
/devspace-sh/devspace
package
Sources
- CVE List CVE-2026-42283
- GitHub Advisory GHSA-hqwm-7x7x-8379
- NVD CVE-2026-42283
- OSV GO-2026-5433
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