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

> Attackers can inject spoofed messages or crash the pShare process in MOOS essential-moos by sending unauthenticated UDP datagrams.

- **Severity:** High 8.8 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Sep 2026
- **Updated:** 4 Sep 2026
- **Also known as:** GHSA-x26f-2hv8-gr33

## What is CVE-2026-85430?

CVE-2026-85430 is a high-severity authentication bypass vulnerability in themoos essential-moos, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-345 (Insufficient Verification of Data Authenticity)

## Which versions are affected by CVE-2026-85430?

It affects 1 product.


Products: Themoos Essential-Moos.

## How do I fix CVE-2026-85430?

No fix has been published for CVE-2026-85430 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-85430 being exploited?

There is no known exploitation of CVE-2026-85430 in the wild and no public exploit code.

## Other vulnerabilities in themoos essential-moos

- [CVE-2026-85433](https://insights.sbomify.com/CVE-2026-85433/): MOOS essential-moos through 10.0.1 pShare Unauthorized Runtime Route Reconfiguration (critical 9.3)
- [CVE-2026-85427](https://insights.sbomify.com/CVE-2026-85427/): MOOS essential-moos through 10.0.1 pAntler Remote Code Execution via Unauthenticated MISSION_FILE (critical 9.2)
- [CVE-2026-85431](https://insights.sbomify.com/CVE-2026-85431/): MOOS essential-moos through 10.0.1 pMOOSBridge Unauthenticated UDP Packet Injection (high 8.7)
- [CVE-2026-85436](https://insights.sbomify.com/CVE-2026-85436/): MOOS essential-moos through 10.0.1 pMOOSBridge Heap Corruption via Negative UDP Length (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-85430 and fix it if it is affected.

What it is: CVE-2026-85430 is a high-severity authentication bypass vulnerability in themoos essential-moos, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-85430 in the wild and no public exploit code.

Affected product: themoos essential-moos. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-85430/ (Markdown: https://insights.sbomify.com/CVE-2026-85430/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-85430
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-85430
- OSV: https://osv.dev/vulnerability/CVE-2026-85430

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-85430/
Summaries are generated and may contain mistakes; the official description above is the record.