Vulnerability in Themoos Core-Moos
CVE-2026-85432
MOOS core-moos through 10.4.0 fails to validate client identity in MOOSDB message processing, allowing authenticated attackers to attribute writes to other clients by supplying arbitrary source identifiers in serialized messages. Attackers can forge message origins and cancel third-party subscriptions by exploiting the disconnect between authenticated connection identity and wire-supplied source attribution.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L.
EPSS exploit prediction
EPSS: 0.005 (42.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
Weakness classification (CWE)
References
- github.com/themoos/core-moos (Product, product)
- github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core… (technical-description, Issue Tracking)
- github.com/themoos/core-moos/commit/26308f0e393f0e80bfa09b275891e776b8dbf522 (Patch, patch, Issue Tracking)
- github.com/themoos/core-moos/pull/76 (issue-tracking, Patch, patch, Issue Tracking)
- www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-moosdb-message-sourc… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-85432?
- CVE-2026-85432 is a high-severity vulnerability in Themoos Core-Moos, classified under Authentication Bypass by Spoofing. CVSS score: 8.2/10. Published 2026-09-03.
- How severe is CVE-2026-85432?
- High severity. CVSS v3 base score is 8.2 out of 10.