Quick answers
- Is CVE-2026-18773 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-18773 being exploited in the wild.
- How severe is CVE-2026-18773?
- Medium severity, with a CVSS score of 6.3, published 4 August 2026.
- Which products and versions are affected?
- NousResearch Hermes Agent up to 2026.6.5.
- Is there a fix for CVE-2026-18773?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-18773 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-18773?
- Check whether you run NousResearch Hermes Agent at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is an authorization bypass in gateway/run.py where the _check_slash_access() function is applied only to registered gateway slash commands but not to operator-configured quick_commands. An authenticated non-admin user can craft a slash command matching a configured quick_command (e.g., /limits) to bypass the allow_admin_from and user_allowed_commands policy restrictions. When the quick_command is of type "exec", the attacker can trigger shell command execution in the gateway process context. The attack requires being an authenticated allowlisted non-admin user with messaging privileges. Public exploits are available.
Affected products
- NousResearch hermes-agent up to 2026.6.5
Timeline
- 2026-06-12: disclosed
- 2026-08-04: advisory