Vulnerability · Published Sep 3, 2026 · Assigned by VulnCheck

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

Critical 9.8

In plain English

A critical-severity missing authentication 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 0.8% (higher than 57% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.8%top 42.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

MOOS core-moos through 10.4.0 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.

Affected products (as reported)

Vendor	Product	Versions
themoos	core-moos	0 – through 10.4.0

Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Pull Request #84 issue-tracking, patch
Proposed fix commit (pull request not merged) patch
https://github.com/themoos/core-moos product
MOOSDB.cpp (verified sink) technical-description
VulnCheck Advisory: MOOS core-moos through 10.4.0 Missing Authentication for MOOSDB Publish, Subscribe and DB_CLEAR third-party-advisory