Eclipse Milo 0.6.0-1.1.4: Blind read of OPC UA diagnostics (No auth)
CVE-2026-63248 Published on August 4, 2026
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.
Vulnerability Analysis
CVE-2026-63248 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is an AuthZ Vulnerability?
The software does not perform an authorization check when an actor attempts to access a resource or perform an action.
CVE-2026-63248 has been classified to as an AuthZ vulnerability or weakness.
Affected Versions
Eclipse Foundation Eclipse Milo:- Version 0.6.0, <= 1.1.4 is affected.