Vulnerability · Published Sep 3, 2026 · Assigned by VulnCheck

CVE-2026-85443MOOS core-moos through 10.4.0 MOOSDB Accept Loop Denial of Service

High 7.5

In plain English

A high-severity uncontrolled resource consumption in core-moos from themoos. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.6%top 49.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

MOOS core-moos through 10.4.0 contains a denial of service vulnerability in MOOSCommServer::ListenLoop() where the accept thread performs a blocking receive without timeout during the wire-protocol handshake. An attacker can open a TCP connection to the MOOSDB port and send no data, causing the accept thread to block indefinitely while holding the socket-list lock, preventing all subsequent client connections.

Affected products (as reported)

Vendor	Product	Versions
themoos	core-moos	0 – through 10.4.0

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Pull Request #83 issue-tracking, patch
Proposed fix commit (pull request not merged) patch
https://github.com/themoos/core-moos product
MOOSCommServer.cpp (verified sink) technical-description
VulnCheck Advisory: MOOS core-moos through 10.4.0 MOOSDB Accept Loop Denial of Service third-party-advisory