CVE-2026-85455 MOOS core-moos through 10.4.0 MOOSDB Out-of-Bounds Read via Short Packet

High 8.8 Published 3 Sep 2026 Updated 4 Sep 2026

Attackers can read out-of-bounds memory or cause crashes by sending crafted short packets to the MOOSDB server before authentication.

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-2026-85455?

CVE-2026-85455 is a high-severity memory corruption 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 contains a buffer over-read vulnerability in CMOOSCommPkt where a four-byte packet triggers out-of-bounds memory access during deserialization. Attackers can open a TCP connection to the MOOSDB port and send a crafted short packet to read memory before authentication.

Weakness: CWE-125

Which versions are affected by CVE-2026-85455?

It affects 1 product.

Products include Themoos Core-Moos.

How do I fix CVE-2026-85455?

No fix has been published for CVE-2026-85455 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-85455 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85455 exists.

Sources

Also known as GHSA-2wvf-qgpv-j3rg.