CVE-2026-85430 MOOS essential-moos through 10.0.1 pShare Unauthenticated UDP Datagram Republishing

High 8.8 Published 3 Sep 2026 Updated 4 Sep 2026

Attackers can inject spoofed messages or crash the pShare process in MOOS essential-moos by sending unauthenticated UDP datagrams.

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-2026-85430?

CVE-2026-85430 is a high-severity authentication bypass vulnerability in themoos essential-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 essential-moos through 10.0.1 contains an authentication bypass vulnerability in pShare that accepts UDP datagrams from any source and republishes them with the attacker-claimed identity intact. Attackers can send crafted UDP datagrams to pShare input routes to inject messages into the local MOOS community under spoofed identities, or send malformed datagrams to crash the pShare process.

Weakness: CWE-345

Which versions are affected by CVE-2026-85430?

It affects 1 product.

Products include Themoos Essential-Moos.

How do I fix CVE-2026-85430?

No fix has been published for CVE-2026-85430 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-85430 being exploited?

There is no known exploitation of CVE-2026-85430 in the wild and no public exploit code.

Sources

Also known as GHSA-x26f-2hv8-gr33.