# CVE-2026-9367: NousResearch hermes-agent terminal_tool approval.py detect_dangerous_command os command injection

> Remote attackers can execute arbitrary OS commands via the terminal tool's command detection logic in the hermes-agent library.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 May 2026
- **Updated:** 26 May 2026
- **Also known as:** GHSA-h9mm-g7gx-9mx6

## What is CVE-2026-9367?

CVE-2026-9367 is a medium-severity command injection vulnerability in NousResearch hermes-agent, published on 24 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was determined in NousResearch hermes-agent up to 5157f5427f19488b31c6fdebbacd15d798ce7f63. This affects the function detect_dangerous_command of the file tools/approval.py of the component terminal_tool. This manipulation causes os command injection. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command), CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2026-9367?


## How do I fix CVE-2026-9367?

No fix has been published for CVE-2026-9367 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-9367 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9367 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-9367 and fix it if it is affected.

What it is: CVE-2026-9367 is a medium-severity command injection vulnerability in NousResearch hermes-agent, published on 24 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9367 exists.

Affected product: NousResearch hermes-agent. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-9367/ (Markdown: https://insights.sbomify.com/CVE-2026-9367/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-9367
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-9367
- OSV: https://osv.dev/vulnerability/CVE-2026-9367

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-9367/
Summaries are generated and may contain mistakes; the official description above is the record.