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MiloApplication · Eclipse

CVE-2026-63248

MEDIUM · 6.5 CVSS v3.1 Published 2026-08-04
Fix available
A fix is available. Upgrade to 1.1.5 or later.
See remediation →
74/100
Remediation priority · Elevated
Remotely reachable No privileges Zero-click 2 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-862

The application checks who you are but not whether you're allowed to perform a given action, so any authenticated user can reach things meant for others. This is the classic “change the ID in the URL” bug. The fix is an authorization check on every request, evaluated against the acting user's permissions.

General guidance for the missing authorization class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
MiloApplication
Affected:>= 0.6.0, < 1.1.5

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 1.1.5 or later
Fixed in 1.1.5
Recommended fix Moderate confidence

Eclipse Milo 1.1.5 or later (latest stable release)

  1. 1. Identify the current Eclipse Milo version in use by checking project dependencies or library files
  2. 2. Review the application's OPC UA server configuration to understand how diagnostics nodes are currently configured
  3. 3. Plan an upgrade to a version beyond 1.1.4 (the latest stable Eclipse Milo release recommended)
  4. 4. Before upgrading, review the Eclipse Milo release notes and changelog for version 1.1.5 and later to confirm the authorization fix is included
  5. 5. Perform upgrade in a test environment first to validate compatibility
  6. 6. After upgrade, verify that diagnostics nodes now properly enforce authorization checks
  7. 7. Monitor for any breaking changes in OPC UA client interactions post-upgrade
Caveat Minor: Review release notes for any API or configuration changes between 1.1.4 and the target upgrade version

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-63248 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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