hermes-agent has an Injection issue
A vulnerability was found in NousResearch hermes-agent 2026.4.23. The impacted element is the function _scan_context_content of the file agent/prompt_builder.py. The manipulation results in injection. The attack may be performed from remote. The exploit has been made public and could 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-2026-9366
- https://github.com/NousResearch/hermes-agent/commit/0dee92df22bdc0cfbcad90ca954aa14916f018de
- https://gist.github.com/YLChen-007/581fd92de5548fbaacb2092e848a75cc
- https://github.com/NousResearch/hermes-agent
- https://vuldb.com/submit/812227
- https://vuldb.com/vuln/365329
- https://vuldb.com/vuln/365329/cti
- https://pypi.org/project/hermes-agent
- https://github.com/advisories/GHSA-pgp4-xr4j-h5cg
- 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-2026-2514 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-pgp4-xr4j-h5cg - 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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