# CVE-2026-108593: 9router 0.4.1 through 0.5.99 Config Injection RCE via hermes-settings Endpoint

> Authenticated users can inject shell commands into Hermes Agent configuration via the hermes-settings endpoint, leading to remote code execution.

- **Severity:** High 7.3 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 10 Oct 2026
- **Updated:** 13 Oct 2026
- **Also known as:** GHSA-chcq-pfxc-99ww

## What is CVE-2026-108593?

CVE-2026-108593 is a high-severity code injection vulnerability in decolua 9router, published on 10 Oct 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

9router 0.4.1 through 0.5.99 contains a configuration injection vulnerability in the POST /api/cli-tools/hermes-settings endpoint that allows authenticated dashboard users to inject arbitrary keys into the Hermes Agent config.yaml file. Attackers can submit a baseUrl containing double quotes and newlines to add hooks_auto_accept and a hooks.post_llm_call shell command, which Hermes Agent executes without approval after an LLM call.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2026-108593?


## How do I fix CVE-2026-108593?

No fix has been published for CVE-2026-108593 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-108593 being exploited?

There is no known exploitation of CVE-2026-108593 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-108593 and fix it if it is affected.

What it is: CVE-2026-108593 is a high-severity code injection vulnerability in decolua 9router, published on 10 Oct 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-108593 in the wild and no public exploit code.

Affected product: decolua 9router. 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-2026-108593/ (Markdown: https://insights.sbomify.com/CVE-2026-108593/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-108593
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-108593
- OSV: https://osv.dev/vulnerability/CVE-2026-108593

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-108593/
Summaries are generated and may contain mistakes; the official description above is the record.