Vulnerability · Published Sep 3, 2026 · Assigned by VulnCheck
CVE-2026-85442MOOS core-moos through 10.4.0 MOOSDB Denial of Service via Unbounded Packet Allocation
High 7.5
In plain English
A high-severity security flaw 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 56% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.8%top 44.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
MOOS core-moos through 10.4.0 fails to validate packet length declarations in CMOOSCommPkt::OnBytesWritten(), allowing unauthenticated attackers to trigger unbounded buffer allocation by sending crafted wire packets. Attackers can send packets with large declared lengths to exhaust server memory and cause denial of service before client authentication completes.
Affected products (as reported)
Weakness: CWE-789 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- Pull Request #81 issue-tracking, patch
- Proposed fix commit (pull request not merged) patch
- https://github.com/themoos/core-moos product
- MOOSCommPkt.cpp (verified sink) technical-description
- VulnCheck Advisory: MOOS core-moos through 10.4.0 MOOSDB Denial of Service via Unbounded Packet Allocation third-party-advisory