RCE in Decolua 9router
CVE-2026-108593
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.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haind/9router-hermes-config-injection (third-party-advisory)
- github.com/decolua/9router/blob/a99cf57239ff778b61e434c2786009d5ed1c412c/src/ap… (technical-description)
- github.com/decolua/9router/blob/a99cf57239ff778b61e434c2786009d5ed1c412c/src/ap… (technical-description)
- github.com/decolua/9router (product)
- www.vulncheck.com/advisories/9router-0.4.1-through-0.5.99-config-injection-rce-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-108593?
- CVE-2026-108593 is a medium-severity vulnerability in Decolua 9router, classified under Code Injection. CVSS score: 6.4/10. Published 2026-10-10.
- How severe is CVE-2026-108593?
- Medium severity. CVSS v3 base score is 6.4 out of 10.