| Component | Hermes Agent |
| Severity | medium (CVSS 6.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
| Published (NVD) | 2026-08-06 |
| Affected versions | not published yet, see the advisory |
| Fixed in | see the vendor advisory |
| Weakness | CWE-266 |
| CISA KEV | not listed |
NVD description
A vulnerability was determined in NousResearch hermes-agent up to 0.16.0. This impacts the function get_tool_definitions of the file agent/agent_init.py of the component disabled_toolsets Handler. This manipulation causes incorrect privilege assignment. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep Hermes Agent off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-18976
- https://github.com/NousResearch/hermes-agent/
- https://github.com/NousResearch/hermes-agent/issues/46171
- https://github.com/NousResearch/hermes-agent/pull/46185
- https://vuldb.com/cve/CVE-2026-18976
- https://vuldb.com/submit/862541
- https://vuldb.com/vuln/386264
- https://vuldb.com/vuln/386264/cti
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