CVE-2026-58080 Missing authorization in Eclipse Milo
An anonymous client can bypass role-based access controls to read metadata, invoke methods, or delete nodes in Eclipse Milo servers using copy() configuration.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-58080?
CVE-2026-58080 is a high-severity missing authorization vulnerability in Eclipse Milo, published on 4 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-58080?
It affects 1 product.
Products include Eclipse Milo.
How do I fix CVE-2026-58080?
No fix has been published for CVE-2026-58080 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-58080 being exploited?
There is no known exploitation of CVE-2026-58080 in the wild and no public exploit code.
Other vulnerabilities in Eclipse Milo
Sources
Also known as GHSA-pvvm-cxq7-hrgr.