CVE-2026-108593
9router 0.4.1 through 0.5.99 Config Injection RCE via hermes-settings Endpoint
- State
- Published
- Severity
- 7.3 High
- Published
- Oct 10, 2026
- Updated
- Oct 13, 2026
- Reserved
- Oct 10, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.3 High | 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 | VulnCheck |
| 3.1 | 6.4 Medium | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-94 Improper Control of Generation of Code ('Code Injection')
Affected Products
| Product | Versions |
|---|---|
9routerdecolua |
|
References
- https://hackmd.io/@haind/9router-hermes-config-injectionthird-party-advisory
- https://github.com/decolua/9router/blob/a99cf57239ff778b61e434c2786009d5ed1c412c/src/app/api/cli-tools/hermes-settings/route.js#L20-L35technical-description
- https://github.com/decolua/9router/blob/a99cf57239ff778b61e434c2786009d5ed1c412c/src/app/api/cli-tools/hermes-settings/route.js#L185-L223technical-description
- https://github.com/decolua/9routerproduct
- VulnCheck Advisory: 9router 0.4.1 through 0.5.99 Config Injection RCE via hermes-settings Endpointthird-party-advisory
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