CVE-2026-85424 MOOS core-moos through 10.4.0 Missing Authentication for MOOSDB Publish, Subscribe and DB_CLEAR

Critical 9.3 Published 3 Sep 2026 Updated 5 Sep 2026

Unauthenticated attackers can connect to MOOSDB to publish, subscribe, or clear all variables and client mail queues, causing data loss and service disruption.

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-2026-85424?

CVE-2026-85424 is a critical missing authorization vulnerability in themoos core-moos, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

MOOS core-moos through 10.4.0 lacks authentication in the wire protocol, allowing unauthenticated clients to connect with full publish, subscribe, and database clear privileges. Attackers can bypass the compile-time protocol string check and connect with arbitrary client names to execute privileged operations including DB_CLEAR which resets all variables and clears client mail queues.

Weakness: CWE-306

Which versions are affected by CVE-2026-85424?

It affects 1 product.

Products include Themoos Core-Moos.

How do I fix CVE-2026-85424?

No fix has been published for CVE-2026-85424 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-2026-85424 being exploited?

There is no known exploitation of CVE-2026-85424 in the wild and no public exploit code.

Sources

Also known as GHSA-9xvw-926p-pjwf.