CVE-2026-108593
9router 0.4.1 through 0.5.99 Config Injection RCE via hermes-settings Endpoint
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-94 |
| Vendor | decolua |
| Product | 9router |
| Published | Oct 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
decolua / 9router
0.4.1 ≤ 0.5.99
References
hackmd.io: https://hackmd.io/@haind/9router-hermes-config-injection github.com: https://github.com/decolua/9router/blob/a99cf57239ff778b61e434c2786009d5ed1c412c/src/app/api/cli-tools/hermes-settings/route.js#L20-L35 github.com: https://github.com/decolua/9router/blob/a99cf57239ff778b61e434c2786009d5ed1c412c/src/app/api/cli-tools/hermes-settings/route.js#L185-L223 github.com: https://github.com/decolua/9router vulncheck.com: https://www.vulncheck.com/advisories/9router-0.4.1-through-0.5.99-config-injection-rce-via-hermes-settings-endpoint
Credits
HaiND from the Post and Telecommunication Institute of Technology