CVE-2026-63248

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.

Score

CVSS 4.0 6.9 Medium

Status

Analyzed - emo@eclipse.org

Published

2026-08-04

Last modified

2026-10-23

Weaknesses

CWE-862

Affected products

• Milo (Eclipse)
• Eclipse Milo (Eclipse Foundation)

References

• https://github.com/eclipse-milo/milo/commit/a5dae1be0657d2b4fcb66e63f377c1dc36069e2a
• https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/598
• https://gitlab.eclipse.org/security/cve-assignment/-/work_items/181