# CVE-2026-6819: HKUDS OpenHarness Plugin Management Command Exposure

> Attackers can remotely install and enable plugins due to exposed lifecycle commands, leading to unauthorized code execution and privilege escalation.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 21 Apr 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-3xqw-r49f-5rj8

## What is CVE-2026-6819?

CVE-2026-6819 is a high-severity missing authorization vulnerability in HKUDS OpenHarness, published on 21 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

HKUDS OpenHarness prior to PR #156 remediation exposes plugin lifecycle commands including /plugin install, /plugin enable, /plugin disable, and /reload-plugins to remote senders by default. Attackers who gain access through the channel layer can remotely manage plugin trust and activation state, enabling unauthorized plugin installation and activation on the system.

Weakness: CWE-276 (Incorrect Default Permissions)

## Which versions are affected by CVE-2026-6819?

It affects 1 product.


Products: Hkuds Openharness.

## How do I fix CVE-2026-6819?

No fix has been published for CVE-2026-6819 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6819 being exploited?

There is no known exploitation of CVE-2026-6819 in the wild and no public exploit code.

## Other vulnerabilities in HKUDS OpenHarness

- [CVE-2026-7551](https://insights.sbomify.com/CVE-2026-7551/): HKUDS OpenHarness Remote Command Execution via /bridge Slash Command (high 8.7)
- [CVE-2026-40515](https://insights.sbomify.com/CVE-2026-40515/): OpenHarness Permission Bypass via grep and glob root argument (high 8.7)
- [CVE-2026-40502](https://insights.sbomify.com/CVE-2026-40502/): OpenHarness Remote Administrative Command Injection via Gateway Handler (high 8.7)
- [CVE-2026-6823](https://insights.sbomify.com/CVE-2026-6823/): HKUDS OpenHarness Insecure Default Remote Channel Allowlist (high 8.3)
- [CVE-2026-40516](https://insights.sbomify.com/CVE-2026-40516/): OpenHarness SSRF via web_fetch and web_search (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6819 and fix it if it is affected.

What it is: CVE-2026-6819 is a high-severity missing authorization vulnerability in HKUDS OpenHarness, published on 21 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-6819 in the wild and no public exploit code.

Affected product: HKUDS OpenHarness. 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-2026-6819/ (Markdown: https://insights.sbomify.com/CVE-2026-6819/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6819
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6819
- OSV: https://osv.dev/vulnerability/CVE-2026-6819

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-6819/
Summaries are generated and may contain mistakes; the official description above is the record.