CVE-2026-18993 NousResearch hermes-agent Memory Toolset model_tools.py access control
Remote attackers can bypass access controls in the Memory Toolset to read or modify data, requiring a patch for NousResearch hermes-agent.
- 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-2026-18993?
CVE-2026-18993 is a medium-severity missing authorization vulnerability in NousResearch hermes-agent, published on 6 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 0.16.0. Affected by this issue is some unknown functionality of the file hermes-agent/model_tools.py of the component Memory Toolset. The manipulation results in improper access controls. The attack can be executed remotely. The exploit is now public and may be used.
Which versions are affected by CVE-2026-18993?
How do I fix CVE-2026-18993?
No fix has been published for CVE-2026-18993 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-2026-18993 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18993 exists.
Sources
Also known as GHSA-4992-66px-gwh3.