| Component | Hermes Agent |
| Severity | medium (CVSS 5) |
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L |
| Published (NVD) | 2026-07-26 |
| Last modified | 2026-07-27 |
| Affected versions | not published yet, see the advisory |
| Fixed in | see the vendor advisory |
| Weakness | CWE-266CWE-284 |
| CISA KEV | not listed |
NVD description
A vulnerability was detected in NousResearch hermes-agent 2026.6.5. Affected by this vulnerability is an unknown functionality of the file hermes-agent/plugins/platforms/simplex/adapter.py of the component SimpleX Gateway Authorization. The manipulation of the argument contactId results in improper access controls. The attack may be launched remotely. A high complexity level is associated with this attack. The exploitation appears to be difficult. The exploit is now public and may be used. The patch is identified as 490c486ff65b766d9de0fe0e6f26e1778aaa8fb3. Applying a patch is advised to resolve this issue.
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-2026-17432
- https://github.com/NousResearch/hermes-agent/
- https://github.com/NousResearch/hermes-agent/commit/490c486ff65b766d9de0fe0e6f26e1778aaa8fb3
- https://github.com/NousResearch/hermes-agent/issues/44729
- https://github.com/NousResearch/hermes-agent/issues/44730
- https://github.com/NousResearch/hermes-agent/pull/41246
- https://vuldb.com/cve/CVE-2026-17432
- https://vuldb.com/submit/862424
- https://vuldb.com/vuln/383065
- https://vuldb.com/vuln/383065/cti
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