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.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/eclipse-milo/milo/commit/a5dae1be0657d2b4fcb66e63f377c1dc36069e2a Patch
- https://gitlab.eclipse.org/security/cve-assignment/-/work_items/181 Issue Tracking, Patch, Vendor Advisory
- https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/598 Issue Tracking, Vendor Advisory
Vendor advisories in the News 1
- Eclipse Foundation Eclipse Milo CISA ICS Advisories · 2026-10-15
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
In the news 1
Change history 1
- First seenCVSS 6.9 · eclipseNVD modified 2026-10-23 23:10
Affected (CPE criteria) 1
cpe:2.3:a:eclipse:milo:*:*:*:*:*:*:*:*
References 3
- https://github.com/eclipse-milo/milo/commit/a5dae1be0657d2b4fcb66e63f377c1dc36069e2a Patch
- https://gitlab.eclipse.org/security/cve-assignment/-/work_items/181 Issue Tracking, Patch, Vendor Advisory
- https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/598 Issue Tracking, Vendor Advisory