---
id: CVE-2026-9353
aliases:
  - GHSA-238w-f66p-w349
  - PYSEC-2026-2509
title: hermes-agent has an Injection issue
summary: hermes-agent has an Injection issue
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'
vendor: hermes-agent
product: hermes-agent
ecosystem: pip
affected:
  - hermes-agent < 0.15.0
patched:
  - hermes-agent 0.15.0
published: '2026-05-26'
updated: '2026-07-13'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-238w-f66p-w349'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-9353'
  - url: 'https://github.com/NousResearch/hermes-agent/pull/26852'
  - url: >-
      https://github.com/NousResearch/hermes-agent/commit/7ebebfbb8d10937cbf2219b4cf5e121b71e67428
  - url: 'https://gist.github.com/YLChen-007/82a3539d6358842e69dfaef0a9fcf14a'
  - url: 'https://github.com/NousResearch/hermes-agent'
  - url: 'https://vuldb.com/submit/812216'
  - url: 'https://vuldb.com/vuln/365316'
  - url: 'https://vuldb.com/vuln/365316/cti'
tags:
  - osv
  - pip
epss: 0.00305
epssPercentile: 0.23424
ingestedAt: '2026-07-13T18:57:50.959Z'
---

## Overview

A security vulnerability has been detected in NousResearch hermes-agent up to 2026.4.23. Impacted is an unknown function of the file agent/skills_guard.py of the component Skills Guard Multi-Word Prompt Handler. The manipulation of the argument THREAT_PATTERNS leads to injection. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

## Affected packages

- `hermes-agent < 0.15.0`

## Remediation

Upgrade to a patched release:

- `hermes-agent 0.15.0`