CVE-2026-14626 NousResearch hermes-agent HTTP API run_agent.py AIAgent.run_conversation denial of service
Remote attackers can cause denial of service in NousResearch hermes-agent by manipulating the todos argument in the HTTP API.
- 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-2026-14626?
CVE-2026-14626 is a medium-severity denial of service vulnerability in NousResearch hermes-agent, published on 4 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A weakness has been identified in NousResearch hermes-agent up to 2026.4.30. The impacted element is the function AIAgent.run_conversation of the file run_agent.py of the component HTTP API. This manipulation of the argument todos causes denial of service. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Weakness: CWE-404
Which versions are affected by CVE-2026-14626?
How do I fix CVE-2026-14626?
No fix has been published for CVE-2026-14626 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-14626 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-14626 exists.
Sources
Also known as GHSA-w268-f7gg-hc49.