CVE-2026-58080: Eclipse Milo

High severity, CVSS 8.2. EPSS: 0.4% chance of exploitation in the next 30 days.

In Eclipse Milo versions 1.0.0 through 1.1.4, `OpcUaServerConfig.copy()` fails to preserve a configured `RoleMapper`. On servers that rely on role permissions and construct the running configuration through `copy()`, sessions receive no role IDs and the default access controller skips role-permission checks, allowing an anonymous client where anonymous sessions are permitted to read role-permission metadata, invoke protected methods, or delete protected nodes.

Affected products

• Eclipse Milo: from 1.0.0, before 1.1.5 (fixed in 1.1.5)

Published 2026-08-04. Last modified 2026-08-05.