Vulnerability in Themoos Core-Moos
CVE-2026-85441
MOOS core-moos through 10.4.0 fails to validate that serialized string lengths are non-negative in CMOOSMsg::operator>>. Unauthenticated attackers can send a crafted message with a negative length value to the MOOSDB port, causing an unhandled exception that terminates the database process.
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: 0.007 (50.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.4% 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: 0.007 · 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, Vendor Advisory)
- github.com/themoos/core-moos/commit/04c92981091fdaa2ff85e2ba7eff94f6288bdbaf (patch, Vendor Advisory)
- github.com/themoos/core-moos/pull/74 (issue-tracking, Patch, patch, Issue Tracking)
- www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-moosdb-denial-of-ser… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-85441?
- CVE-2026-85441 is a high-severity vulnerability in Themoos Core-Moos, classified under CWE-195. CVSS score: 7.5/10. Published 2026-09-03.
- How severe is CVE-2026-85441?
- High severity. CVSS v3 base score is 7.5 out of 10.