CVE-2026-85432 MOOS core-moos through 10.4.0 MOOSDB Message Source Spoofing via Wire Identity

High 8.8 Published 3 Sep 2026 Updated 4 Sep 2026

Authenticated attackers can spoof message sources and cancel subscriptions in MOOSDB by bypassing identity validation in serialized messages.

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-2026-85432?

CVE-2026-85432 is a high-severity 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 fails to validate client identity in MOOSDB message processing, allowing authenticated attackers to attribute writes to other clients by supplying arbitrary source identifiers in serialized messages. Attackers can forge message origins and cancel third-party subscriptions by exploiting the disconnect between authenticated connection identity and wire-supplied source attribution.

Weakness: CWE-290

Which versions are affected by CVE-2026-85432?

It affects 1 product.

Products include Themoos Core-Moos.

How do I fix CVE-2026-85432?

No fix has been published for CVE-2026-85432 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-2026-85432 being exploited?

There is no known exploitation of CVE-2026-85432 in the wild and no public exploit code.

Sources

Also known as GHSA-5cg3-9gv9-c53v.