In Eclipse Milo versions 0.6.0 through 1.1.4, OPC UA server diagnostics nodes do not enforce access authorization. An anonymous client can enable diagnostics over a None/None endpoint without a certificate; with a trusted client application certificate over SignAndEncrypt, it can read security diagnostics for other active sessions, exposing usernames, login history, authentication mechanisms, security modes and policies, and public client certificates.
{
"cna_assigner": "eclipse",
"cwe_ids": [
"CWE-862"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63248.json"
}{
"extracted_events": [
{
"cpe": "cpe:2.3:a:eclipse:milo:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0.6.0"
},
{
"fixed": "1.1.5"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "a5dae1be0657d2b4fcb66e63f377c1dc36069e2a"
}
],
"source": "REFERENCES_COMMIT"
}
]
}