Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') Affecting hermes-agent package, versions [,0.15.0)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-HERMESAGENT-17728403
- published30 Jun 2026
- disclosed26 May 2026
- creditUnknown
Introduced: 26 May 2026
CVE-2026-9353 (opens in a new tab)How to fix?
Upgrade hermes-agent to version 0.15.0 or higher.
Overview
hermes-agent is a The self-improving AI agent — creates skills from experience, improves them during use, and runs anywhere
Affected versions of this package are vulnerable to Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in the Skills Guard Multi-Word Prompt Handler process in the file agent/skills_guard.py when handling the THREAT_PATTERNS argument. An attacker can execute arbitrary code or commands by supplying crafted input remotely.