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.
{
"cwe_ids": [
"CWE-200",
"CWE-306"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42283.json",
"cna_assigner": "GitHub_M"
}{
"cpe": "cpe:2.3:a:devspace:devspace:6.3.20:*:*:*:*:*:*:*",
"source": [
"AFFECTED_FIELD",
"CPE_STRING"
],
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "6.3.21"
},
{
"introduced": "6.3.20"
},
{
"last_affected": "6.3.20"
}
]
}