# CVE-2026-76639: Unitree G1 EDU 1.5.2 Unauthenticated RCE via DDS Bridge and Path Traversal

> Network-adjacent attackers can execute arbitrary commands as root on Unitree G1 EDU robots by chaining unauthenticated DDS access, weak cryptography, and path traversal.

- **Severity:** High 8.7 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Aug 2026
- **Updated:** 31 Aug 2026
- **Also known as:** GHSA-q24f-vr89-8h97

## What is CVE-2026-76639?

CVE-2026-76639 is a high-severity path traversal vulnerability in Unitree Robotics G1 EDU, published on 27 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Unitree G1 EDU firmware through 1.5.2 contains an unauthenticated remote code execution vulnerability that allows network-adjacent attackers to execute arbitrary commands as root by chaining three weaknesses: an unauthenticated WebRTC-to-DDS bridge on TCP port 9991, a static AES-128 key stored with world-readable permissions, and a path traversal flaw in the chat_go knowledge upload API. Attackers can publish DDS control messages to restart the bashrunner service, plant a malicious payload in its script execution directory via path traversal, and trigger execution of that payload as uid 0 through the bashrunner shell subprocess.

Weakness: CWE-306 (Missing Authentication for Critical Functionality), CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-76639?


## How do I fix CVE-2026-76639?

No fix has been published for CVE-2026-76639 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-76639 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-76639 exists.

Public exploit code:

- Unitree G1 RCE PoC & Scripts (CVE-2026-76639 / CVE-2026-76640) technical details at boschko.ca/g1-ble-rce/ (github_poc): https://github.com/OlivierLaflamme/UniBLEed

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-76639 and fix it if it is affected.

What it is: CVE-2026-76639 is a high-severity path traversal vulnerability in Unitree Robotics G1 EDU, published on 27 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-76639 exists.

Affected product: Unitree Robotics G1 EDU. 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-2026-76639/ (Markdown: https://insights.sbomify.com/CVE-2026-76639/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76639
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76639
- OSV: https://osv.dev/vulnerability/CVE-2026-76639

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-76639/
Summaries are generated and may contain mistakes; the official description above is the record.