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.
- 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
- None listed
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
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.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-108593 being exploited?
There is no known exploitation of CVE-2026-108593 in the wild and no public exploit code.
Sources
Also known as GHSA-chcq-pfxc-99ww.