CVE-2026-18773: Nousresearch Hermes-Agent

Medium severity, CVSS 6.3. EPSS: 0.3% chance of exploitation in the next 30 days.

A vulnerability was detected in NousResearch hermes-agent up to 2026.6.5. Affected by this issue is the function _check_slash_access of the file gateway/run.py of the component Quick Command Handler. The manipulation results in incorrect authorization. The attack can be launched remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

• Nousresearch Hermes-Agent: version 2026.6.0 only; version 2026.6.1 only; version 2026.6.2 only; version 2026.6.3 only; version 2026.6.4 only; version 2026.6.5 only

Published 2026-08-04. Last modified 2026-08-12.