hermes-agent has an Injection issue
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | hermes-agent | < 0.15.0 | 0.15.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-9353
- https://github.com/NousResearch/hermes-agent/pull/26852
- https://github.com/NousResearch/hermes-agent/commit/7ebebfbb8d10937cbf2219b4cf5e121b71e67428
- https://gist.github.com/YLChen-007/82a3539d6358842e69dfaef0a9fcf14a
- https://github.com/NousResearch/hermes-agent
- https://vuldb.com/submit/812216
- https://vuldb.com/vuln/365316
- https://vuldb.com/vuln/365316/cti
- https://pypi.org/project/hermes-agent
- https://github.com/advisories/GHSA-238w-f66p-w349
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L- Weakness (CWE)
CWE-74- Platform
- Python (PyPI)
- Package
hermes-agent- Disclosed
- 26.05.2026
- Updated
- 11.10.2026 14:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-2509 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-238w-f66p-w349 - CC BY 4.0
Vulnerability history: hermes-agent
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 10
- First → latest
- 05.2026 06.2026
- Without a fix
- 2
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 6
- Low 3
Disclosures per year
- 2026: 10
-
hermes-agent has an Injection issue this entry
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