CVE-2026-58080Public exploitNetwork attack vector

Unauthenticated authorization bypass via dropped role mapping

Published Aug 4, 2026 · Updated Aug 4, 2026

Authorization bypass in Eclipse Milo 1.0.0 through 1.1.4 allows remote attackers to perform role-protected OPC UA operations. OpcUaServerConfig.copy() omits the configured RoleMapper, leaving sessions without role IDs and causing the default access controller to skip role-permission checks. Exploitation requires a server built from a copied configuration that relies on role permissions; anonymous access can expose metadata, protected methods, and node deletion.

CVSS severity8.8
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Eclipse Milo 1.0.0 through 1.1.4 allows remote attackers to perform role-protected OPC UA operations. OpcUaServerConfig.copy() omits the configured RoleMapper, leaving sessions without role IDs and causing the default access controller to skip role-permission checks. Exploitation requires a server built from a copied configuration that relies on role permissions; anonymous access can expose metadata, protected methods, and node deletion.

The record

CVE
CVE-2026-58080
Published
Aug 4, 2026
Updated
Aug 4, 2026
Vendor
The Eclipse Foundation
Product
Eclipse Milo
Classifications
CWE-862, CAPEC-122
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0 <1.1.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Eclipse Foundation · Eclipse Miloversion=1.0.0 <1.1.5

Published CVSS scores

8.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
8.8Eclipse FoundationCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
CAPEC-122Privilege Abuse

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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