Threat Intelligence Database

Eclipse Milo versions 0.6.0 through 1.1.4 have a vulnerability where OPC UA server diagnostics nodes do not enforce access authorization. This allows an anonymous client to enable diagnostics without authentication and a trusted client to read sensitive security diagnostics of other sessions, including usernames and authentication details.

CVE-2026-58080 affects Eclipse Milo versions 1.0.0 through 1.1.4. The vulnerability arises because the OpcUaServerConfig.copy() method does not preserve a configured RoleMapper. This causes sessions to receive no role IDs, leading the default access controller to skip role-permission checks. As a result, anonymous clients can read role-permission metadata, invoke protected methods, or delete protected nodes where anonymous sessions are allowed.

Eclipse Milo versions 0.6.0 through 1.1.4 contain a vulnerability in the UASC server transport handlers where partial message chunks are not released upon channel disconnection. This allows a remote unauthenticated client to exhaust pooled direct memory by repeatedly sending incomplete chunks and disconnecting, potentially causing the server to terminate.

CVE-2026-62927 is a high-severity authorization bypass vulnerability in Eclipse Milo versions 1.0.0 through 1.1.4. The Call service incorrectly dispatches mixed batches of method calls after authorization checks, allowing low-privileged or anonymous clients to execute methods that should be denied by batching them with allowed methods.

CVE-2026-60007 is a critical vulnerability in Eclipse Milo versions 0.6.0 through 1.1.4 where username-token processing leaks distinguishable errors for invalid RSA PKCS#1 v1.5 padding and other authentication failures. This flaw allows an on-path attacker to exploit repeated unauthenticated ActivateSession requests as a padding oracle to recover a victim's password and authenticate using the recovered credentials.

Eclipse Milo versions 1.0.0 through 1.1.4 contain a vulnerability where monitored-item quota accounting is not exception-safe. An unauthenticated remote client can trigger a StackOverflowError by sending deeply nested PubSub ExtensionObjects in a CreateMonitoredItems event filter. This causes the server-global monitored-item quota to be exhausted and prevents new monitored items from being created until the server is restarted. Existing monitored items and other server functions remain unaffected.