Resource exhaustion in Themoos Core-Moos
CVE-2026-85443
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (49.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.003
Affected products
Weakness classification (CWE)
References
- github.com/themoos/core-moos (Product, product)
- github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core… (technical-description, Patch, Issue Tracking)
- github.com/themoos/core-moos/commit/8d940303949a850d4625eca2a60f27adee9c3ec4 (Patch, patch, Issue Tracking)
- github.com/themoos/core-moos/pull/83 (issue-tracking, Patch, patch, Issue Tracking)
- www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-moosdb-accept-loop-d… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-85443?
- CVE-2026-85443 is a high-severity vulnerability in Themoos Core-Moos, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-09-03.
- How severe is CVE-2026-85443?
- High severity. CVSS v3 base score is 7.5 out of 10.