CVE-2026-62927 Missing authorization in Eclipse Milo

High 8.7 Published 4 Aug 2026 Updated 4 Aug 2026

Attackers can bypass authorization checks in Eclipse Milo by batching denied methods with allowed ones, enabling privilege escalation or code execution.

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-2026-62927?

CVE-2026-62927 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, the Call service dispatches the original mixed batch to address-space handlers after calculating authorization, allowing an anonymous or otherwise low-privileged client to execute a denied method by batching it with an allowed method.

Weakness: CWE-863

Which versions are affected by CVE-2026-62927?

It affects 1 product.

Products include Eclipse Milo.

How do I fix CVE-2026-62927?

No fix has been published for CVE-2026-62927 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-2026-62927 being exploited?

There is no known exploitation of CVE-2026-62927 in the wild and no public exploit code.

Sources

Also known as GHSA-978q-37g3-wq8g.