What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-10 · updated 2026-10-13
• Weakness: CWE-94

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.

Affected products

• decolua 9router: from 0.4.1 through 0.5.99

References

• https://github.com/decolua/9router
• https://github.com/decolua/9router/blob/a99cf57239ff778b61e434c2786009d5ed1c412c/src/app/api/cli-tools/hermes-settings/route.js#L185-L223
• https://github.com/decolua/9router/blob/a99cf57239ff778b61e434c2786009d5ed1c412c/src/app/api/cli-tools/hermes-settings/route.js#L20-L35
• https://hackmd.io/@haind/9router-hermes-config-injection
• https://www.vulncheck.com/advisories/9router-0.4.1-through-0.5.99-config-injection-rce-via-hermes-settings-endpoint
• https://hackmd.io/@haind/9router-hermes-config-injection

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