CVE-2026-18773 NousResearch hermes-agent Quick run.py _check_slash_access authorization
Remote attackers can bypass authorization checks in the Quick Command Handler of the hermes-agent library to execute unauthorized actions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18773?
CVE-2026-18773 is a medium-severity missing authorization vulnerability in NousResearch hermes-agent, published on 4 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-18773?
How do I fix CVE-2026-18773?
No fix has been published for CVE-2026-18773 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-18773 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18773 exists.
Sources
Also known as GHSA-9cgm-8qh5-gx92.